Question 1

A force accelerates a body of mass M. The same force applied to a second body produces three times the acceleration. What is the mass of the second body?

Accepted Answer

A)  M 
B)  3M 
C)  M/3 
D)  9M 
E)  M/9 
A)  M 
B)  3M 
C)  M/3 
D)  9M 
E)  M/9

Question 2

A 44.5-N weight is hung on a spring scale, and the scale is hung on a string. The string is lowered at a rate such that the entire assembly has a downward acceleration of 4.90 m/s2. The scale reads

Accepted Answer

A)  0 N 
B)  22.2 N 
C)  44.5 N 
D)  66.7 N 
E)  71.2 N 
A)  0 N 
B)  22.2 N 
C)  44.5 N 
D)  66.7 N 
E)  71.2 N

Question 3

A person of weight w is in an upward-moving elevator when the cable suddenly breaks. What is the person's apparent weight immediately after the elevator starts to fall?

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 4

The diagrams below show the application of a force F on a block of mass m.   Which diagram(s) produces the largest acceleration on the block in the horizontal direction?

Accepted Answer

A)  (1) and (3) 
B)  (2) 
C)  (3) 
D)  (2) and (4) 
E)  The acceleration is the same for all four. 
A)  (1) and (3) 
B)  (2) 
C)  (3) 
D)  (2) and (4) 
E)  The acceleration is the same for all four.

Question 5

Two groups of five men each are engaged in a tug-of-war, each man pulling with a force of 900 N. If the rope does not move, the tension in it is

Accepted Answer

A)  18 kN 
B)  9.0 kN 
C)  44 kN 
D)  4.5 kN 
E)  0.46 kN 
A)  18 kN 
B)  9.0 kN 
C)  44 kN 
D)  4.5 kN 
E)  0.46 kN

Question 6

Rachel has been reading her physics book. She takes her weighing scales into an elevator and stands on them. If her normal weight is 690 N (155 lbs), and the elevator moves upward at 0.25g and then down at 0.25g, what is the difference between the up and down scale readings?

Accepted Answer

A)  690 N 
B)  520 N 
C)  170 N 
D)  345 N 
E)  1.04 $\times$ 103 N 
A)  690 N 
B)  520 N 
C)  170 N 
D)  345 N 
E)  1.04 $\times$ 103 N

Question 7

A lamp with a mass m = 42.6 kg is hanging from wires as shown. The tension   1 in the vertical wire is

Accepted Answer

A)  210 N 
B)  417 N 
C)  570 N 
D)  360 N 
E)  730 N 
A)  210 N 
B)  417 N 
C)  570 N 
D)  360 N 
E)  730 N

Question 8

A book is placed on a flat horizontal table. The table exerts a normal force on the book. The origin of the normal force in terms of the fundamental forces is

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 9

A net force is exerted toward the east on an object that is initially at rest. In which direction does the object start to move?

Accepted Answer

A)  north 
B)  east 
C)  west 
D)  south 
E)  It may start to move in any of these directions. 
A)  north 
B)  east 
C)  west 
D)  south 
E)  It may start to move in any of these directions.

Question 10

Which of the following free-body diagrams represents the car going uphill at a constant speed?

Accepted Answer

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

Question 11

A horse-drawn coach is decelerating at 3.0 m/s2 while moving in a straight line horizontally. A 350-g mass is hanging on a string 1.6 m long from the ceiling of the coach. The angle that the string makes with the vertical is

Accepted Answer

A)  9.3º toward the front of the coach. 
B)  17º toward the front of the coach. 
C)  9.3º toward the back of the coach. 
D)  2.5º toward the front of the coach. 
E)  0º, or straight down. 
A)  9.3º toward the front of the coach. 
B)  17º toward the front of the coach. 
C)  9.3º toward the back of the coach. 
D)  2.5º toward the front of the coach. 
E)  0º, or straight down.

Question 12

A ball of mass 2.0 kg is acted on by two forces,   and   . The acceleration vector of the mass is (in m/s2)

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 13

The figure below shows two forces, FS1U1B11S1U1B0 and FS1U1B12S1U1B0, acting on an object.   Use the vector diagrams to answer the next questions.  
-A third force is applied on the object so that the net force on the object is zero. Which force vector best represents the third force?

Accepted Answer

A)  (1) 
B)  (2) 
C)  (3) 
D)  (4) 
E)  none of the vectors 
A)  (1) 
B)  (2) 
C)  (3) 
D)  (4) 
E)  none of the vectors

Question 14

Newton's law of inertia does not describe the behavior of objects

Accepted Answer

A)  in inertial frames of reference. 
B)  moving with constant velocity relative to a given frame of reference. 
C)  at rest relative to a given frame of reference. 
D)  moving in accelerated frames of reference. 
E)  moving in a straight line at constant speed relative to a given reference frame. 
A)  in inertial frames of reference. 
B)  moving with constant velocity relative to a given frame of reference. 
C)  at rest relative to a given frame of reference. 
D)  moving in accelerated frames of reference. 
E)  moving in a straight line at constant speed relative to a given reference frame.

Question 15

A 10-N force is applied to mass M. The same force is applied to mass 4M. The ratio of the acceleration of the smaller mass to the acceleration of the larger mass is

Accepted Answer

A)  4 to 1 
B)  20 to 1 
C)  1 to 1 
D)  1 to 2 
E)  1 to 4 
A)  4 to 1 
B)  20 to 1 
C)  1 to 1 
D)  1 to 2 
E)  1 to 4

Question 16

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 while the elevator descends toward the ground floor at a constant speed?

Accepted Answer

A)  more than mg 
B)  less than mg 
C)  mg 
D)  zero 
E)  This cannot be answered without knowing how fast the elevator is descending. 
A)  more than mg 
B)  less than mg 
C)  mg 
D)  zero 
E)  This cannot be answered without knowing how fast the elevator is descending.

Question 17

A box sits on an inclined plane without sliding. As the angle of inclination increases, the normal force

Accepted Answer

A)  increases. 
B)  decreases. 
C)  does not change. 
D)  is directed upward. 
E)  is directed in the direction of the gravitational force. 
A)  increases. 
B)  decreases. 
C)  does not change. 
D)  is directed upward. 
E)  is directed in the direction of the gravitational force.

Question 18

If force (in N), length (in m), and time (in s) were considered to be the fundamental quantities, the units of mass would be

Accepted Answer

A)  s2/(N · m) 
B)  m · s 
C)  N2 · m/s2  
D)  N · s2/m 
E)  m/N 
A)  s2/(N · m) 
B)  m · s 
C)  N2 · m/s2  
D)  N · s2/m 
E)  m/N

Question 19

The tension of the right-hand string divided by the tension of the left-hand string is given by

Accepted Answer

A)  sin $\theta$2 / sin $\theta$1  
B)  cos $\theta$1 / cos $\theta$2  
C)  cos $\theta$2 / cos $\theta$1  
D)  sin $\theta$1 / sin $\theta$2  
E)  (mg - T1 sin $\theta$1) / (T1 $\times$ sin $\theta$2) 
A)  sin $\theta$2 / sin $\theta$1  
B)  cos $\theta$1 / cos $\theta$2  
C)  cos $\theta$2 / cos $\theta$1  
D)  sin $\theta$1 / sin $\theta$2  
E)  (mg - T1 sin $\theta$1) / (T1 $\times$ sin $\theta$2)

Question 20

A mass m is hanging on a string that passes over a pulley and is then attached to another mass 3m that is resting on a horizontal table. Neglect friction. Mass m is held motionless and is then released. When it has fallen a distance h, it will have a speed v which can be calculated from the formula

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these is correct. 
A)    
B)    
C)    
D)    
E)  None of these is correct.

A force accelerates a body of mass M. The same force applied to a second body produces three times the acceleration. What is the mass of the second body?

A 44.5-N weight is hung on a spring scale, and the scale is hung on a string. The string is lowered at a rate such that the entire assembly has a downward acceleration of 4.90 m/s². The scale reads

A person of weight w is in an upward-moving elevator when the cable suddenly breaks. What is the person's apparent weight immediately after the elevator starts to fall?

The diagrams below show the application of a force F on a block of mass m. Which diagram(s) produces the largest acceleration on the block in the horizontal direction?

Two groups of five men each are engaged in a tug-of-war, each man pulling with a force of 900 N. If the rope does not move, the tension in it is

Rachel has been reading her physics book. She takes her weighing scales into an elevator and stands on them. If her normal weight is 690 N (155 lbs), and the elevator moves upward at 0.25g and then down at 0.25g, what is the difference between the up and down scale readings?

A lamp with a mass m = 42.6 kg is hanging from wires as shown. The tension ₁ in the vertical wire is

A book is placed on a flat horizontal table. The table exerts a normal force on the book. The origin of the normal force in terms of the fundamental forces is

A net force is exerted toward the east on an object that is initially at rest. In which direction does the object start to move?

Which of the following free-body diagrams represents the car going uphill at a constant speed?

A horse-drawn coach is decelerating at 3.0 m/s² while moving in a straight line horizontally. A 350-g mass is hanging on a string 1.6 m long from the ceiling of the coach. The angle that the string makes with the vertical is

A ball of mass 2.0 kg is acted on by two forces, and . The acceleration vector of the mass is (in m/s²)

The figure below shows two forces, F₁ and F₂, acting on an object. Use the vector diagrams to answer the next questions. -A third force is applied on the object so that the net force on the object is zero. Which force vector best represents the third force?

Newton's law of inertia does not describe the behavior of objects

A 10-N force is applied to mass M. The same force is applied to mass 4M. The ratio of the acceleration of the smaller mass to the acceleration of the larger mass is

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 while the elevator descends toward the ground floor at a constant speed?

A box sits on an inclined plane without sliding. As the angle of inclination increases, the normal force

If force (in N), length (in m), and time (in s) were considered to be the fundamental quantities, the units of mass would be

The tension of the right-hand string divided by the tension of the left-hand string is given by

A mass m is hanging on a string that passes over a pulley and is then attached to another mass 3m that is resting on a horizontal table. Neglect friction. Mass m is held motionless and is then released. When it has fallen a distance h, it will have a speed v which can be calculated from the formula

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

A force accelerates a body of mass M. The same force applied to a second body produces three times the acceleration. What is the mass of the second body?

A 44.5-N weight is hung on a spring scale, and the scale is hung on a string. The string is lowered at a rate such that the entire assembly has a downward acceleration of 4.90 m/s2. The scale reads

A person of weight w is in an upward-moving elevator when the cable suddenly breaks. What is the person's apparent weight immediately after the elevator starts to fall?

The diagrams below show the application of a force F on a block of mass m. Which diagram(s) produces the largest acceleration on the block in the horizontal direction?

Two groups of five men each are engaged in a tug-of-war, each man pulling with a force of 900 N. If the rope does not move, the tension in it is

Rachel has been reading her physics book. She takes her weighing scales into an elevator and stands on them. If her normal weight is 690 N (155 lbs), and the elevator moves upward at 0.25g and then down at 0.25g, what is the difference between the up and down scale readings?

A lamp with a mass m = 42.6 kg is hanging from wires as shown. The tension 1 in the vertical wire is

A book is placed on a flat horizontal table. The table exerts a normal force on the book. The origin of the normal force in terms of the fundamental forces is

A net force is exerted toward the east on an object that is initially at rest. In which direction does the object start to move?

Which of the following free-body diagrams represents the car going uphill at a constant speed?

A horse-drawn coach is decelerating at 3.0 m/s2 while moving in a straight line horizontally. A 350-g mass is hanging on a string 1.6 m long from the ceiling of the coach. The angle that the string makes with the vertical is

A ball of mass 2.0 kg is acted on by two forces, and . The acceleration vector of the mass is (in m/s2)

The figure below shows two forces, F1 and F2, acting on an object. Use the vector diagrams to answer the next questions. -A third force is applied on the object so that the net force on the object is zero. Which force vector best represents the third force?

Newton's law of inertia does not describe the behavior of objects

A 10-N force is applied to mass M. The same force is applied to mass 4M. The ratio of the acceleration of the smaller mass to the acceleration of the larger mass is

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 while the elevator descends toward the ground floor at a constant speed?

A box sits on an inclined plane without sliding. As the angle of inclination increases, the normal force

If force (in N), length (in m), and time (in s) were considered to be the fundamental quantities, the units of mass would be

The tension of the right-hand string divided by the tension of the left-hand string is given by

A mass m is hanging on a string that passes over a pulley and is then attached to another mass 3m that is resting on a horizontal table. Neglect friction. Mass m is held motionless and is then released. When it has fallen a distance h, it will have a speed v which can be calculated from the formula

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

A 44.5-N weight is hung on a spring scale, and the scale is hung on a string. The string is lowered at a rate such that the entire assembly has a downward acceleration of 4.90 m/s². The scale reads

A lamp with a mass m = 42.6 kg is hanging from wires as shown. The tension ₁ in the vertical wire is

A horse-drawn coach is decelerating at 3.0 m/s² while moving in a straight line horizontally. A 350-g mass is hanging on a string 1.6 m long from the ceiling of the coach. The angle that the string makes with the vertical is

A ball of mass 2.0 kg is acted on by two forces, and . The acceleration vector of the mass is (in m/s²)

The figure below shows two forces, F₁ and F₂, acting on an object. Use the vector diagrams to answer the next questions. -A third force is applied on the object so that the net force on the object is zero. Which force vector best represents the third force?