Question 1

If a force F is required to extend a spring by 20 cm, what force is required to extend it by 30 cm?

Accepted Answer

A)  F 
B)  (2/3)F 
C)  (3/2)F 
D)  600F 
E)  (3/5)F 
A)  F 
B)  (2/3)F 
C)  (3/2)F 
D)  600F 
E)  (3/5)F C

Question 2

Two springs with different spring constants, k1 and k2, are connected as shown in the figure below.   
A force F is applied to one end. The force exerted by the wall on the spring is (take + to the right)

Accepted Answer

A)  0 
B)  -k1 $\Delta$x1 
C)  -k2 $\Delta$x2 
D)  F 
E)  -F 
A)  0 
B)  -k1 $\Delta$x1 
C)  -k2 $\Delta$x2 
D)  F 
E)  -F E

Question 3

A horse harnessed to a wagon refuses to pull, citing Newton's third law, which states that for every force there is an equal but opposite reaction force. The horse, incorrect in its reasoning, can pull the wagon because

Accepted Answer

A)  after it gives a jerk and the wagon is moving, its pulling force will be greater than the reaction to this force. 
B)  the law applies only to static cases. 
C)  the wagon cannot possibly pull back with a force equal in magnitude to the pulling force. 
D)  the action and reaction forces are acting on different bodies. 
E)  after friction is overcome, the reaction force is less than the pulling force. 
A)  after it gives a jerk and the wagon is moving, its pulling force will be greater than the reaction to this force. 
B)  the law applies only to static cases. 
C)  the wagon cannot possibly pull back with a force equal in magnitude to the pulling force. 
D)  the action and reaction forces are acting on different bodies. 
E)  after friction is overcome, the reaction force is less than the pulling force. D

Question 4

A body of weight w rests on the surface of Earth. What force does the body exert on Earth? (ignore Earth's rotation)

Accepted Answer

A)  w 
B)  greater than w 
C)  less than w 
D)  9.81w 
E)  zero 
A)  w 
B)  greater than w 
C)  less than w 
D)  9.81w 
E)  zero

Question 5

Which of the following statements is true?

Accepted Answer

A)  The mass of a body is a quantitative measure of its inertia. 
B)  Mass is a vector quantity. 
C)  The mass of a body is directly proportional to the acceleration it is experiencing. 
D)  The unit of mass in the U.S. customary system is the newton. 
E)  The mass of a body is inversely proportional to the resultant force acting on it. 
A)  The mass of a body is a quantitative measure of its inertia. 
B)  Mass is a vector quantity. 
C)  The mass of a body is directly proportional to the acceleration it is experiencing. 
D)  The unit of mass in the U.S. customary system is the newton. 
E)  The mass of a body is inversely proportional to the resultant force acting on it.

Question 6

Which of the following is not a unit of force?

Accepted Answer

A)  newton 
B)  pound 
C)  slug 
D)  dyne 
E)  kg · m/s2  
A)  newton 
B)  pound 
C)  slug 
D)  dyne 
E)  kg · m/s2

Question 7

A man pushes horizontally on the book with force   and moves it at constant speed along the table. Three "agents" exert forces on the book, shown as   ,   , and   in the second diagram, and three "agents" exert forces on the table, shown as   ,   , and   in the third diagram. The "action-reaction" forces of Newton's third law are

Accepted Answer

A)    and   . 
B)    and   . 
C)    and   . 
D)    and   . 
E)    and   . 
A)    and   . 
B)    and   . 
C)    and   . 
D)    and   . 
E)    and   .

Question 8

A force accelerates a body of mass M. A second body requires twice as much force to produce the same acceleration. What is the mass of the second body?

Accepted Answer

A)  M 
B)  2M 
C)  M/2 
D)  4M 
E)  M/4 
A)  M 
B)  2M 
C)  M/2 
D)  4M 
E)  M/4

Question 9

Which of the following free-body diagrams represents the block sliding down a frictionless inclined plane?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 10

In a crash test the strapped-in, 75-kg dummy moves a distance of 0.80 m when the test car is slammed straight into a wall at 11.2 m/s (~25 mph). The average force acting on the dummy during the collision is how many times his own weight?

Accepted Answer

A)  0.13 
B)  78 
C)  0.71 
D)  8.0 
E)  4.0 
A)  0.13 
B)  78 
C)  0.71 
D)  8.0 
E)  4.0

Question 11

A fat cat, ever conscious of its weight, walks into an elevator and steps on a scale. The elevator begins to accelerate downward. While the elevator is accelerating, the scale reads

Accepted Answer

A)  more than when the elevator is stationary. 
B)  more than if the elevator were accelerating upward. 
C)  less than when the elevator is stationary. 
D)  a negative value. 
E)  Insufficient information is given to answer correctly. 
A)  more than when the elevator is stationary. 
B)  more than if the elevator were accelerating upward. 
C)  less than when the elevator is stationary. 
D)  a negative value. 
E)  Insufficient information is given to answer correctly.

Question 12

A force of F = 90 N is exerted on mass m1 as shown. Both m1 and m2 accelerate to the right at 3 m/s along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. If m2 = 10 kg, calculate the mass m1.

Accepted Answer

A)  2.7 kg 
B)  17 kg 
C)  27 kg 
D)  1.8 kg 
E)  24 kg 
A)  2.7 kg 
B)  17 kg 
C)  27 kg 
D)  1.8 kg 
E)  24 kg

Question 13

Spiral springs A and B are identical. When a weight of 12 N is fastened to the hook on A, the hook is lowered 2 cm. If a weight of 18 N is fastened to the hook on B, that hook is lowered

Accepted Answer

A)  8 cm 
B)  6 cm 
C)  3 cm 
D)  4 cm 
E)  5 cm 
A)  8 cm 
B)  6 cm 
C)  3 cm 
D)  4 cm 
E)  5 cm

Question 14

A 6-kg block sitting on a smooth table is connected to a free-hanging 2-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

Accepted Answer

A)  equal to g. 
B)  half of g. 
C)  one-third of g. 
D)  one-fourth of g. 
E)  two-thirds of g. 
A)  equal to g. 
B)  half of g. 
C)  one-third of g. 
D)  one-fourth of g. 
E)  two-thirds of g.

Question 15

A 15-kg block sitting on a smooth table is connected to a free-hanging 5-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

Accepted Answer

A)  equal to g. 
B)  half of g. 
C)  one-third of g. 
D)  one-fourth of g. 
E)  zero. 
A)  equal to g. 
B)  half of g. 
C)  one-third of g. 
D)  one-fourth of g. 
E)  zero.

Question 16

The concept of a field

Accepted Answer

A)  provides us with a way to understand how a body's presence is known over great distances. 
B)  is a useful alternative to action at a distance for explaining gravitational forces. 
C)  is that of space distorted by the presence of an object. 
D)  is useful in describing electromagnetic interactions as well as gravitational interactions. 
E)  is described by all of these. 
A)  provides us with a way to understand how a body's presence is known over great distances. 
B)  is a useful alternative to action at a distance for explaining gravitational forces. 
C)  is that of space distorted by the presence of an object. 
D)  is useful in describing electromagnetic interactions as well as gravitational interactions. 
E)  is described by all of these.

Question 17

Which of the following free-body diagrams represents the car going downhill without acceleration?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 18

Which fundamental force holds the atoms together in a block of wood?

Accepted Answer

A)  gravitational force 
B)  electromagnetic force 
C)  weak nuclear force 
D)  strong nuclear force 
E)  all the four forces 
A)  gravitational force 
B)  electromagnetic force 
C)  weak nuclear force 
D)  strong nuclear force 
E)  all the four forces

Question 19

A lamp with a mass m is suspended from the ceiling by two cords as shown. The ratio of the magnitude of the vertical component of the tension in   2 to that in   3 is

Accepted Answer

A)  1:1 
B)  1:2 
C)    
D)  3:2 
E)  3:1 
A)  1:1 
B)  1:2 
C)    
D)  3:2 
E)  3:1

Question 20

You are riding an elevator that is accelerating upward at 2.20 m/s2. You have a spring balance accurately calibrated in newtons. When you hang a mass of 10.0 kg on the balance, the reading of the balance is

Accepted Answer

A)  120 N 
B)  981 N 
C)  76.0 N 
D)  10.0 N 
E)  9.81 N 
A)  120 N 
B)  981 N 
C)  76.0 N 
D)  10.0 N 
E)  9.81 N

If a force F is required to extend a spring by 20 cm, what force is required to extend it by 30 cm?

Two springs with different spring constants, k₁ and k₂, are connected as shown in the figure below. A force F is applied to one end. The force exerted by the wall on the spring is (take + to the right)

A horse harnessed to a wagon refuses to pull, citing Newton's third law, which states that for every force there is an equal but opposite reaction force. The horse, incorrect in its reasoning, can pull the wagon because

A body of weight w rests on the surface of Earth. What force does the body exert on Earth? (ignore Earth's rotation)

Which of the following statements is true?

Which of the following is not a unit of force?

A force accelerates a body of mass M. A second body requires twice as much force to produce the same acceleration. What is the mass of the second body?

Which of the following free-body diagrams represents the block sliding down a frictionless inclined plane?

In a crash test the strapped-in, 75-kg dummy moves a distance of 0.80 m when the test car is slammed straight into a wall at 11.2 m/s (~25 mph). The average force acting on the dummy during the collision is how many times his own weight?

A fat cat, ever conscious of its weight, walks into an elevator and steps on a scale. The elevator begins to accelerate downward. While the elevator is accelerating, the scale reads

A force of F = 90 N is exerted on mass m₁ as shown. Both m₁ and m₂ accelerate to the right at 3 m/s along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. If m₂ = 10 kg, calculate the mass m₁.

Spiral springs A and B are identical. When a weight of 12 N is fastened to the hook on A, the hook is lowered 2 cm. If a weight of 18 N is fastened to the hook on B, that hook is lowered

A 6-kg block sitting on a smooth table is connected to a free-hanging 2-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

A 15-kg block sitting on a smooth table is connected to a free-hanging 5-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

The concept of a field

Which of the following free-body diagrams represents the car going downhill without acceleration?

Which fundamental force holds the atoms together in a block of wood?

A lamp with a mass m is suspended from the ceiling by two cords as shown. The ratio of the magnitude of the vertical component of the tension in ₂ to that in ₃ is

You are riding an elevator that is accelerating upward at 2.20 m/s². You have a spring balance accurately calibrated in newtons. When you hang a mass of 10.0 kg on the balance, the reading of the balance is

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Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

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Conservation of Angular Momentum

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Static Equilibrium and Elasticity

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Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

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The Second Law of Thermodynamics

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Exam 4: Newtons Laws

If a force F is required to extend a spring by 20 cm, what force is required to extend it by 30 cm?

Two springs with different spring constants, k1 and k2, are connected as shown in the figure below. A force F is applied to one end. The force exerted by the wall on the spring is (take + to the right)

A horse harnessed to a wagon refuses to pull, citing Newton's third law, which states that for every force there is an equal but opposite reaction force. The horse, incorrect in its reasoning, can pull the wagon because

A body of weight w rests on the surface of Earth. What force does the body exert on Earth? (ignore Earth's rotation)

Which of the following statements is true?

Which of the following is not a unit of force?

A force accelerates a body of mass M. A second body requires twice as much force to produce the same acceleration. What is the mass of the second body?

Which of the following free-body diagrams represents the block sliding down a frictionless inclined plane?

In a crash test the strapped-in, 75-kg dummy moves a distance of 0.80 m when the test car is slammed straight into a wall at 11.2 m/s (~25 mph). The average force acting on the dummy during the collision is how many times his own weight?

A fat cat, ever conscious of its weight, walks into an elevator and steps on a scale. The elevator begins to accelerate downward. While the elevator is accelerating, the scale reads

A force of F = 90 N is exerted on mass m1 as shown. Both m1 and m2 accelerate to the right at 3 m/s along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. If m2 = 10 kg, calculate the mass m1.

Spiral springs A and B are identical. When a weight of 12 N is fastened to the hook on A, the hook is lowered 2 cm. If a weight of 18 N is fastened to the hook on B, that hook is lowered

A 6-kg block sitting on a smooth table is connected to a free-hanging 2-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

A 15-kg block sitting on a smooth table is connected to a free-hanging 5-kg mass by a stretchless, massless cord that passes over a small frictionless pulley. The acceleration of the two-block system is

The concept of a field

Which of the following free-body diagrams represents the car going downhill without acceleration?

Which fundamental force holds the atoms together in a block of wood?

A lamp with a mass m is suspended from the ceiling by two cords as shown. The ratio of the magnitude of the vertical component of the tension in 2 to that in 3 is

You are riding an elevator that is accelerating upward at 2.20 m/s2. You have a spring balance accurately calibrated in newtons. When you hang a mass of 10.0 kg on the balance, the reading of the balance 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

Two springs with different spring constants, k₁ and k₂, are connected as shown in the figure below. A force F is applied to one end. The force exerted by the wall on the spring is (take + to the right)

A force of F = 90 N is exerted on mass m₁ as shown. Both m₁ and m₂ accelerate to the right at 3 m/s along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. If m₂ = 10 kg, calculate the mass m₁.

A lamp with a mass m is suspended from the ceiling by two cords as shown. The ratio of the magnitude of the vertical component of the tension in ₂ to that in ₃ is

You are riding an elevator that is accelerating upward at 2.20 m/s². You have a spring balance accurately calibrated in newtons. When you hang a mass of 10.0 kg on the balance, the reading of the balance is