Question 1

You are going up in an elevator that is accelerating upwards on Earth. Suppose you were to do the same thing on Mars. Your weight on Mars will be ___ your weight on Earth.

Accepted Answer

A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on what g is on Mars 
A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on what g is on Mars

Question 2

An unknown force   is applied to two unknown masses MA and
MB. Their accelerations   A and   B are measured. From these data we can determine

Accepted Answer

A)  the magnitude of   only. 
B)  MA and MB only. 
C)  the magnitudes of   , MA, and MB only. 
D)  the ratio of MA to MB only. 
E)  MA, MB, and the weights of MA and MB. 
A)  the magnitude of   only. 
B)  MA and MB only. 
C)  the magnitudes of   , MA, and MB only. 
D)  the ratio of MA to MB only. 
E)  MA, MB, and the weights of MA and MB.

Question 3

A particle with a mass of 200 g is acted on by a force of 4.5 N. The acceleration of the particle is

Accepted Answer

A)  90 cm/s2  
B)  2.3 cm/s2  
C)  0.90 km/s2  
D)  23 m/s2  
E)  9.0 m/s2  
A)  90 cm/s2  
B)  2.3 cm/s2  
C)  0.90 km/s2  
D)  23 m/s2  
E)  9.0 m/s2

Question 4

A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his weight in the tire is

Accepted Answer

A)  (1/2)W 
B)  W 
C)  2W 
D)  (2/3)W 
E)  (3/2)W 
A)  (1/2)W 
B)  W 
C)  2W 
D)  (2/3)W 
E)  (3/2)W

Question 5

A force of 3.0 N acts on a body along a direction 30º above the horizontal. In addition, there is a gravitational force of 4.0 N downward. The resultant force has a magnitude of

Accepted Answer

A)  7.0 N 
B)  6.8 N 
C)  6.1 N 
D)  3.6 N 
E)  5.0 N 
A)  7.0 N 
B)  6.8 N 
C)  6.1 N 
D)  3.6 N 
E)  5.0 N

Question 6

A girl walks on a level floor in a straight line in the +x direction. Her foot exerts a force on the floor. The direction of the reaction force by the floor on her foot is in

Accepted Answer

A)  +x direction 
B)  -x direction 
C)  +y direction (vertically up) 
D)  -y direction (vertically down) 
E)  depends how fast she is walking 
A)  +x direction 
B)  -x direction 
C)  +y direction (vertically up) 
D)  -y direction (vertically down) 
E)  depends how fast she is walking

Question 7

A shopper steps on an escalator moving downward at a constant speed toward the bargain basement in a large department store. On his way down, the normal force exerted on him by the step of the escalator is

Accepted Answer

A)  greater than his weight when he is off the escalator. 
B)  equal to his weight when he is off the escalator. 
C)  less than his weight when he is off the escalator. 
D)  dependent on how fast the escalator is moving. 
E)  unknown; insufficient information is given to answer correctly. 
A)  greater than his weight when he is off the escalator. 
B)  equal to his weight when he is off the escalator. 
C)  less than his weight when he is off the escalator. 
D)  dependent on how fast the escalator is moving. 
E)  unknown; insufficient information is given to answer correctly.

Question 8

Three forces F1, F2 and F3 act on an object. If F1 = 3N i + 5N j + 7N k, F2 = -5N i - 2N j -2N k, and the object is moving at constant velocity then the vector force F3 is

Accepted Answer

A)  -2N i - 3N j - 5N k 
B)  2N i - 3N j - 5N k 
C)  2N i + 3N j - 5N k 
D)  -8N i - 7N j - 9N k 
E)  8N i + 7 N j +9N k 
A)  -2N i - 3N j - 5N k 
B)  2N i - 3N j - 5N k 
C)  2N i + 3N j - 5N k 
D)  -8N i - 7N j - 9N k 
E)  8N i + 7 N j +9N k

Question 9

Three forces,   ,   , and   , act on a mass of 4.2 kg. The forces are 
  = 2.0 N acting to the east, 
  = 5.0 N acting 45º to the north of east, and 
  = 4.0 N acting 30º to the north of west.
The direction of the net acceleration

Accepted Answer

A)  cannot be determined because the acceleration is zero. 
B)  is 60º north of east. 
C)  is 70º north of east. 
D)  is 51º north of east. 
E)  is 44º north of east. 
A)  cannot be determined because the acceleration is zero. 
B)  is 60º north of east. 
C)  is 70º north of east. 
D)  is 51º north of east. 
E)  is 44º north of east.

Question 10

A lamp of mass m hangs from a spring scale that is attached to the ceiling of an elevator. When the elevator is stopped at the fortieth floor, the scale reads mg. What does it read as the elevator slows down to stop at the forty-fifth floor?

Accepted Answer

A)  more than mg 
B)  less than mg 
C)  mg 
D)  zero 
E)  One cannot tell without knowing how fast the elevator is stopping. 
A)  more than mg 
B)  less than mg 
C)  mg 
D)  zero 
E)  One cannot tell without knowing how fast the elevator is stopping.

Question 11

A man riding in an elevator has an apparent weight greater than his actual weight. Which one of the following statements could be true?

Accepted Answer

A)  The elevator moves upward with constant speed. 
B)  The elevator moves downward with constant speed. 
C)  The elevator moves upward with decreasing speed. 
D)  The elevator moves downward with decreasing speed. 
E)  The elevator moves downward with increasing speed. 
A)  The elevator moves upward with constant speed. 
B)  The elevator moves downward with constant speed. 
C)  The elevator moves upward with decreasing speed. 
D)  The elevator moves downward with decreasing speed. 
E)  The elevator moves downward with increasing speed.

Question 12

Two masses, m1 and m2, connected by a massless string, are accelerated uniformly on a frictionless surface as shown. The ratio of the tensions   1/   2 is given by

Accepted Answer

A)  m1/m2  
B)  m2/m1  
C)  (m1 + m2)/m2  
D)  m1/(m1 + m2) 
E)  m2/(m1 + m2) 
A)  m1/m2  
B)  m2/m1  
C)  (m1 + m2)/m2  
D)  m1/(m1 + m2) 
E)  m2/(m1 + m2)

Question 13

Two tug-of-war teams are pulling on the ends of a rope, each team with a force of 1000 N. If the rope does not move, the tension in the rope is

Accepted Answer

A)  2000 N 
B)  500 N 
C)  1000 N 
D)  0 N 
E)  2000 kg 
A)  2000 N 
B)  500 N 
C)  1000 N 
D)  0 N 
E)  2000 kg

Question 14

A body is sent out in space. Which of the following statements is true of this body as it moves away from Earth?

Accepted Answer

A)  The body's mass and weight remain equal. 
B)  The body's mass remains constant, and its weight decreases. 
C)  The body's mass decreases, and its weight remains constant. 
D)  The body's mass and weight decrease. 
E)  The body's mass decreases, and its weight increases. 
A)  The body's mass and weight remain equal. 
B)  The body's mass remains constant, and its weight decreases. 
C)  The body's mass decreases, and its weight remains constant. 
D)  The body's mass and weight decrease. 
E)  The body's mass decreases, and its weight increases.

Question 15

The SI unit of force is the

Accepted Answer

A)  newton 
B)  gram 
C)  pound 
D)  kilogram 
E)  None of these is correct. 
A)  newton 
B)  gram 
C)  pound 
D)  kilogram 
E)  None of these is correct.

Question 16

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is

Accepted Answer

A)  3.0 $\times$ 102 N 
B)  0.22 N 
C)  0.16 N 
D)  0.30 N 
E)  0.98 N 
A)  3.0 $\times$ 102 N 
B)  0.22 N 
C)  0.16 N 
D)  0.30 N 
E)  0.98 N

Question 17

If two metal blocks of different masses slide freely down the same frictionless incline, which one of the following is true?

Accepted Answer

A)  They have equal accelerations 
B)  They have unequal accelerations, but the forces acting on them are equal. 
C)  The more massive block reaches the bottom first. 
D)  The less massive block reaches the bottom first. 
E)  None of these is correct. 
A)  They have equal accelerations 
B)  They have unequal accelerations, but the forces acting on them are equal. 
C)  The more massive block reaches the bottom first. 
D)  The less massive block reaches the bottom first. 
E)  None of these is correct.

Question 18

A frictionless pulley of negligible mass is hung from the ceiling using a rope, also of negligible mass. Two masses, m1 and m2 (m1 2) are connected to the rope over the pulley. The masses are free to drop. The magnitude of the tension Ttop is ____ the sum of the weights W1 = m1g and W2 = m2g.

Accepted Answer

A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on T1 and T2. 
A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on T1 and T2.

Question 19

The force needed to accelerate "Opportunity" (Opportunity is a Mars rover) on Mars at 1 m/s2 in the horizontal direction is ____ the force needed to accelerate the rover while it was undergoing testing on Earth.

Accepted Answer

A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on what g is on Mars 
A)  less than 
B)  equal to 
C)  greater than 
D)  unable to tell 
E)  depends on what g is on Mars

Question 20

The mass of a body that weighs 2.00 N at sea level is

Accepted Answer

A)  0.204 kg 
B)  2.00 kg 
C)  19.6 kg 
D)  9.80 kg 
E)  0.451 kg 
A)  0.204 kg 
B)  2.00 kg 
C)  19.6 kg 
D)  9.80 kg 
E)  0.451 kg

You are going up in an elevator that is accelerating upwards on Earth. Suppose you were to do the same thing on Mars. Your weight on Mars will be ___ your weight on Earth.

An unknown force is applied to two unknown masses M_A and M_B. Their accelerations _A and _B are measured. From these data we can determine

A particle with a mass of 200 g is acted on by a force of 4.5 N. The acceleration of the particle is

A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his weight in the tire is

A force of 3.0 N acts on a body along a direction 30º above the horizontal. In addition, there is a gravitational force of 4.0 N downward. The resultant force has a magnitude of

A girl walks on a level floor in a straight line in the +x direction. Her foot exerts a force on the floor. The direction of the reaction force by the floor on her foot is in

A shopper steps on an escalator moving downward at a constant speed toward the bargain basement in a large department store. On his way down, the normal force exerted on him by the step of the escalator is

Three forces F₁, F₂ and F₃act on an object. If F₁ = 3N i + 5N j + 7N k, F₂ = -5N i - 2N j -2N k, and the object is moving at constant velocity then the vector force F₃ is

Three forces, , , and , act on a mass of 4.2 kg. The forces are = 2.0 N acting to the east, = 5.0 N acting 45º to the north of east, and = 4.0 N acting 30º to the north of west. The direction of the net acceleration

A lamp of mass m hangs from a spring scale that is attached to the ceiling of an elevator. When the elevator is stopped at the fortieth floor, the scale reads mg. What does it read as the elevator slows down to stop at the forty-fifth floor?

A man riding in an elevator has an apparent weight greater than his actual weight. Which one of the following statements could be true?

Two masses, m₁ and m₂, connected by a massless string, are accelerated uniformly on a frictionless surface as shown. The ratio of the tensions ₁/ ₂ is given by

Two tug-of-war teams are pulling on the ends of a rope, each team with a force of 1000 N. If the rope does not move, the tension in the rope is

A body is sent out in space. Which of the following statements is true of this body as it moves away from Earth?

The SI unit of force is the

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is

If two metal blocks of different masses slide freely down the same frictionless incline, which one of the following is true?

The force needed to accelerate "Opportunity" (Opportunity is a Mars rover) on Mars at 1 m/s² in the horizontal direction is ____ the force needed to accelerate the rover while it was undergoing testing on Earth.

The mass of a body that weighs 2.00 N at sea level is

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

Exam 4: Newtons Laws

You are going up in an elevator that is accelerating upwards on Earth. Suppose you were to do the same thing on Mars. Your weight on Mars will be ___ your weight on Earth.

An unknown force is applied to two unknown masses MA and MB. Their accelerations A and B are measured. From these data we can determine

A particle with a mass of 200 g is acted on by a force of 4.5 N. The acceleration of the particle is

A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his weight in the tire is

A force of 3.0 N acts on a body along a direction 30º above the horizontal. In addition, there is a gravitational force of 4.0 N downward. The resultant force has a magnitude of

A girl walks on a level floor in a straight line in the +x direction. Her foot exerts a force on the floor. The direction of the reaction force by the floor on her foot is in

A shopper steps on an escalator moving downward at a constant speed toward the bargain basement in a large department store. On his way down, the normal force exerted on him by the step of the escalator is

Three forces F1, F2 and F3 act on an object. If F1 = 3N i + 5N j + 7N k, F2 = -5N i - 2N j -2N k, and the object is moving at constant velocity then the vector force F3 is

Three forces, , , and , act on a mass of 4.2 kg. The forces are = 2.0 N acting to the east, = 5.0 N acting 45º to the north of east, and = 4.0 N acting 30º to the north of west. The direction of the net acceleration

A lamp of mass m hangs from a spring scale that is attached to the ceiling of an elevator. When the elevator is stopped at the fortieth floor, the scale reads mg. What does it read as the elevator slows down to stop at the forty-fifth floor?

A man riding in an elevator has an apparent weight greater than his actual weight. Which one of the following statements could be true?

Two masses, m1 and m2, connected by a massless string, are accelerated uniformly on a frictionless surface as shown. The ratio of the tensions 1/ 2 is given by

Two tug-of-war teams are pulling on the ends of a rope, each team with a force of 1000 N. If the rope does not move, the tension in the rope is

A body is sent out in space. Which of the following statements is true of this body as it moves away from Earth?

The SI unit of force is the

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is

If two metal blocks of different masses slide freely down the same frictionless incline, which one of the following is true?

A frictionless pulley of negligible mass is hung from the ceiling using a rope, also of negligible mass. Two masses, m1 and m2 (m1 < m2) are connected to the rope over the pulley. The masses are free to drop. The magnitude of the tension Ttop is ____ the sum of the weights W1 = m1g and W2 = m2g.

The force needed to accelerate "Opportunity" (Opportunity is a Mars rover) on Mars at 1 m/s2 in the horizontal direction is ____ the force needed to accelerate the rover while it was undergoing testing on Earth.

The mass of a body that weighs 2.00 N at sea level is

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

An unknown force is applied to two unknown masses M_A and M_B. Their accelerations _A and _B are measured. From these data we can determine

Three forces F₁, F₂ and F₃act on an object. If F₁ = 3N i + 5N j + 7N k, F₂ = -5N i - 2N j -2N k, and the object is moving at constant velocity then the vector force F₃ is

Two masses, m₁ and m₂, connected by a massless string, are accelerated uniformly on a frictionless surface as shown. The ratio of the tensions ₁/ ₂ is given by

The force needed to accelerate "Opportunity" (Opportunity is a Mars rover) on Mars at 1 m/s² in the horizontal direction is ____ the force needed to accelerate the rover while it was undergoing testing on Earth.