Question 1

The horizontal surface on which the objects slide is frictionless.If M = 1.0 kg and the magnitude of the force of the small block on the large block is 5.2 N,determine F.

Accepted Answer

A) 6.0 N 
B) 9.0 N 
C) 7.8 N 
D) 4.8 N 
E) 4.1 N 
A) 6.0 N 
B) 9.0 N 
C) 7.8 N 
D) 4.8 N 
E) 4.1 N

Question 2

A juggler throws two balls up to the same height so that they pass each other halfway up when A is rising and B is descending.Ignore air resistance and buoyant forces.Which statement is true of the two balls at that point?

Accepted Answer

A) There is an residual upward force from the hand on each ball. 
B) There is a greater residual force from the hand on A than there is on B. 
C) Only gravity acts on B but there is an additional residual force from the hand on A. 
D) There is an additional downwards force besides gravity on each ball. 
E) The only force acting on each ball is the gravitational force. 
A) There is an residual upward force from the hand on each ball. 
B) There is a greater residual force from the hand on A than there is on B. 
C) Only gravity acts on B but there is an additional residual force from the hand on A. 
D) There is an additional downwards force besides gravity on each ball. 
E) The only force acting on each ball is the gravitational force.

Question 3

Given the equation  
,which answer provides the best description of a possible physical situation?

Accepted Answer

A) A 3.00 kg mass is suspended from the ceiling. 
B) A 2.00 kg mass hanging over a pulley drags a 3.00 kg mass along a frictionless horizontal surface. 
C) A 3.00 kg mass hanging over a pulley drags a 2.00 kg mass along a frictionless horizontal surface. 
D) A 3.00 kg mass hanging over a pulley drags a 5.00 kg mass along a frictionless horizontal surface. 
E) A 5.00 kg mass hanging over a pulley drags a 3.00 kg mass along a frictionless horizontal surface. 
A) A 3.00 kg mass is suspended from the ceiling. 
B) A 2.00 kg mass hanging over a pulley drags a 3.00 kg mass along a frictionless horizontal surface. 
C) A 3.00 kg mass hanging over a pulley drags a 2.00 kg mass along a frictionless horizontal surface. 
D) A 3.00 kg mass hanging over a pulley drags a 5.00 kg mass along a frictionless horizontal surface. 
E) A 5.00 kg mass hanging over a pulley drags a 3.00 kg mass along a frictionless horizontal surface.

Question 4

A 3.0-kg block slides on a frictionless 20° inclined plane.A force of 16 N acting parallel to the incline and up the incline is applied to the block.What is the acceleration of the block?

Accepted Answer

A) 2.0 m/s2 down the incline 
B) 5.3 m/s2 up the incline 
C) 2.0 m/s2 up the incline 
D) 3.9 m/s2 down the incline 
E) 3.9 m/s2 up the incline 
A) 2.0 m/s2 down the incline 
B) 5.3 m/s2 up the incline 
C) 2.0 m/s2 up the incline 
D) 3.9 m/s2 down the incline 
E) 3.9 m/s2 up the incline

Question 5

In the figure shown,the coefficient of kinetic friction between the block and the incline is 0.29.What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley.

Accepted Answer

A) 5.4 m/s2 
B) 5.2 m/s2 
C) 4.9 m/s2 
D) 5.6 m/s2 
E) 7.9 m/s2 
A) 5.4 m/s2 
B) 5.2 m/s2 
C) 4.9 m/s2 
D) 5.6 m/s2 
E) 7.9 m/s2

Question 6

Three boxes are pushed across a frictionless horizontal surface as shown.When we compare the normal force N2,5 that mass 2m exerts on mass 5m with the normal force N5,10 that mass 5m exerts on mass 10m,we find that

Accepted Answer

A) N2,5 = N5,10 = F. 
B) N2,5 = F > N5,10. 
C) F > N2,5 = N5,10. 
D) F > N2,5 > N5,10. 
E) F > N5,10 > N2,5. 
A) N2,5 = N5,10 = F. 
B) N2,5 = F > N5,10. 
C) F > N2,5 = N5,10. 
D) F > N2,5 > N5,10. 
E) F > N5,10 > N2,5.

Question 7

Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks,as shown.The coefficient of kinetic friction between the blocks and the surface is 0.25.If each block has an acceleration of 2.0 m/s2 to the right,what is the magnitude F of the applied force?

Accepted Answer

A) 25 N 
B) 18 N 
C) 11 N 
D) 14 N 
E) 7.0 N 
A) 25 N 
B) 18 N 
C) 11 N 
D) 14 N 
E) 7.0 N

Question 8

Two people,each of 70 kg mass,are riding in an elevator.One is standing on the floor.The other is hanging on a rope suspended from the ceiling.Compare the force  
The floor exerts on the first person to the force  
The rope exerts on the second person.Which statement is correct?

Accepted Answer

A) They are equal and opposite in direction. 
B) They are equal and have the same direction. 
C)    is greater than   ,but they have the same direction. 
D)    is greater than   ,but they have opposite directions. 
E)    is less than   ,but they have the same direction. 
A) They are equal and opposite in direction. 
B) They are equal and have the same direction. 
C)    is greater than   ,but they have the same direction. 
D)    is greater than   ,but they have opposite directions. 
E)    is less than   ,but they have the same direction.

Question 9

Exhibit 5-2
A 4.00 kg block is suspended from the roof of an elevator.A 2.00 kg block is suspended from the 4.00 kg block.The tensions in strings 1 and 2 are labeled   and   .   Use this exhibit to answer the following question(s).
-Refer to Exhibit 5-2.When the elevator accelerates upwards with an acceleration of 2.20 m/s2,the magnitudes   A  Are

Accepted Answer

A) 30.4 N;15.2 N. 
B) 39.2 N;19.6 N. 
C) 45.6 N;15.2 N. 
D) 48.0 N;24.0 N. 
E) 72.0 N;24.0 N. 
A) 30.4 N;15.2 N. 
B) 39.2 N;19.6 N. 
C) 45.6 N;15.2 N. 
D) 48.0 N;24.0 N. 
E) 72.0 N;24.0 N.

Question 10

A 5.0-kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is decreasing at a constant rate of 2.0 m/s in each second.What is the tension in the string supporting the mass?

Accepted Answer

A) 49 N 
B) 39 N 
C) 59 N 
D) 10 N 
E) 42 N 
A) 49 N 
B) 39 N 
C) 59 N 
D) 10 N 
E) 42 N

Question 11

The apparent weight of a fish in an elevator is greatest when the elevator

Accepted Answer

A) moves downward at constant velocity. 
B) moves upward at constant velocity. 
C) accelerates downward. 
D) accelerates upward. 
E) is not moving. 
A) moves downward at constant velocity. 
B) moves upward at constant velocity. 
C) accelerates downward. 
D) accelerates upward. 
E) is not moving.

Question 12

In the figure,if F = 2.0 N and M = 1.0 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

Accepted Answer

A) 2.6 N 
B) 1.1 N 
C) 2.1 N 
D) 1.6 N 
E) 3.7 N 
A) 2.6 N 
B) 1.1 N 
C) 2.1 N 
D) 1.6 N 
E) 3.7 N

Question 13

In the figure,the coefficient of kinetic friction between the surface and the larger block is 0.20,and the coefficient of kinetic friction between the surface and the smaller block is 0.30.If F = 10 N and M = 1.0 kg,what is the tension in the connecting string?

Accepted Answer

A) 8.0 N 
B) 6.0 N 
C) 6.7 N 
D) 8.7 N 
E) 3.0 N 
A) 8.0 N 
B) 6.0 N 
C) 6.7 N 
D) 8.7 N 
E) 3.0 N

Question 14

Two forces are the only forces acting on a 3.0-kg object which moves with an acceleration of 3.0 m/s2 in the positive y direction.If one of the forces acts in the positive x direction and has a magnitude of 8.0 N,what is the magnitude of the other force?

Accepted Answer

A) 12 N 
B) 14 N 
C) 16 N 
D) 18 N 
E) 22 N 
A) 12 N 
B) 14 N 
C) 16 N 
D) 18 N 
E) 22 N

Question 15

The tension in a string from which a 4.0-kg object is suspended in an elevator is equal to 44 N.What is the acceleration of the elevator?

Accepted Answer

A) 11 m/s2 upward 
B) 1.2 m/s2 upward 
C) 1.2 m/s2 downward 
D) 10 m/s2 upward 
E) 2.4 m/s2 downward 
A) 11 m/s2 upward 
B) 1.2 m/s2 upward 
C) 1.2 m/s2 downward 
D) 10 m/s2 upward 
E) 2.4 m/s2 downward

Question 16

If the tension,T,is 15 N and the magnitude of the acceleration,a,is 3.0 m/s2,what is the mass,m,of the suspended object? Assume that all surfaces and the pulley are frictionless.

Accepted Answer

A) 3.1 kg 
B) 2.5 kg 
C) 2.8 kg 
D) 2.2 kg 
E) 3.7 kg 
A) 3.1 kg 
B) 2.5 kg 
C) 2.8 kg 
D) 2.2 kg 
E) 3.7 kg

Question 17

A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface.At an instant when the sled's acceleration has a horizontal component of 6.0 m/s2 and a downward component of 2.8 m/s2,what is the magnitude of the force on the rider by the sled?

Accepted Answer

A) 0.83 kN 
B) 0.98 kN 
C) 0.65 kN 
D) 0.68 kN 
E) 0.72 kN 
A) 0.83 kN 
B) 0.98 kN 
C) 0.65 kN 
D) 0.68 kN 
E) 0.72 kN

Question 18

A high-diver of mass 70.0 kg jumps off a board 10.0 m above the water.If,two seconds after entering the water,his downward motion is stopped,what average upward force did the water exert on him?

Accepted Answer

The answer of A high-diver of mass 70.0 kg jumps...

Question 19

A book is resting on a table.How many forces would be in the free-body diagram of the book?

Accepted Answer

A) one 
B) two of the same type 
C) two of different types 
D) three or more of the same type 
E) three or more of at least two different types 
A) one 
B) two of the same type 
C) two of different types 
D) three or more of the same type 
E) three or more of at least two different types

Question 20

If F = 8.0 N and M = 1.0 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

Accepted Answer

A) 4.1 N 
B) 3.5 N 
C) 3.8 N 
D) 3.1 N 
E) 4.8 N 
A) 4.1 N 
B) 3.5 N 
C) 3.8 N 
D) 3.1 N 
E) 4.8 N

Exam 5: The Laws of Motion

The horizontal surface on which the objects slide is frictionless.If M = 1.0 kg and the magnitude of the force of the small block on the large block is 5.2 N,determine F.

A juggler throws two balls up to the same height so that they pass each other halfway up when A is rising and B is descending.Ignore air resistance and buoyant forces.Which statement is true of the two balls at that point?

Given the equation ,which answer provides the best description of a possible physical situation?

A 3.0-kg block slides on a frictionless 20° inclined plane.A force of 16 N acting parallel to the incline and up the incline is applied to the block.What is the acceleration of the block?

In the figure shown,the coefficient of kinetic friction between the block and the incline is 0.29.What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley.

Three boxes are pushed across a frictionless horizontal surface as shown.When we compare the normal force N2,5 that mass 2m exerts on mass 5m with the normal force N5,10 that mass 5m exerts on mass 10m,we find that

Two people,each of 70 kg mass,are riding in an elevator.One is standing on the floor.The other is hanging on a rope suspended from the ceiling.Compare the force The floor exerts on the first person to the force The rope exerts on the second person.Which statement is correct?

A 5.0-kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is decreasing at a constant rate of 2.0 m/s in each second.What is the tension in the string supporting the mass?

The apparent weight of a fish in an elevator is greatest when the elevator

In the figure,if F = 2.0 N and M = 1.0 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

In the figure,the coefficient of kinetic friction between the surface and the larger block is 0.20,and the coefficient of kinetic friction between the surface and the smaller block is 0.30.If F = 10 N and M = 1.0 kg,what is the tension in the connecting string?

Two forces are the only forces acting on a 3.0-kg object which moves with an acceleration of 3.0 m/s2 in the positive y direction.If one of the forces acts in the positive x direction and has a magnitude of 8.0 N,what is the magnitude of the other force?

The tension in a string from which a 4.0-kg object is suspended in an elevator is equal to 44 N.What is the acceleration of the elevator?

If the tension,T,is 15 N and the magnitude of the acceleration,a,is 3.0 m/s2,what is the mass,m,of the suspended object? Assume that all surfaces and the pulley are frictionless.

A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface.At an instant when the sled's acceleration has a horizontal component of 6.0 m/s2 and a downward component of 2.8 m/s2,what is the magnitude of the force on the rider by the sled?

A high-diver of mass 70.0 kg jumps off a board 10.0 m above the water.If,two seconds after entering the water,his downward motion is stopped,what average upward force did the water exert on him?

A book is resting on a table.How many forces would be in the free-body diagram of the book?

If F = 8.0 N and M = 1.0 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

Physics and Measurement

Motion in One Dimension

Vectors

Motion in Two Dimensions

Circular Motion and Other Applications of Newtons Laws

Energy of a System

Conservation of Energy

Linear Momentum and Collisions

Rotation of a Rigid Object About a Fixed Axis

Angular Momentum

Static Equilibrium and Elasticity

Universal Gravitation

Fluid Mechanics

Oscillatory Motion

Wave Motion

Sound Waves

Superposition and Standing Waves

Temperature

The First Law of Thermodynamics

The Kinetic Theory of Gases

Heat Engines, entropy, and the Second Law of Thermodynamics

Electric Fields

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current and Resistance

Direct-Current Circuits

Magnetic Fields

Sources of the Magnetic Field

Faradays Law

Inductance

Alternating-Current Circuits

Electromagnetic Waves

The Nature of Light and the Principles of Ray Optics

Image Formation

Wave Optics

Diffraction Patterns and Polarization

Relativity

Introduction to Quantum Physics

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Three boxes are pushed across a frictionless horizontal surface as shown.When we compare the normal force N_2,5 that mass 2m exerts on mass 5m with the normal force N_5,10 that mass 5m exerts on mass 10m,we find that

Two forces are the only forces acting on a 3.0-kg object which moves with an acceleration of 3.0 m/s² in the positive y direction.If one of the forces acts in the positive x direction and has a magnitude of 8.0 N,what is the magnitude of the other force?

If the tension,T,is 15 N and the magnitude of the acceleration,a,is 3.0 m/s²,what is the mass,m,of the suspended object? Assume that all surfaces and the pulley are frictionless.

A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface.At an instant when the sled's acceleration has a horizontal component of 6.0 m/s² and a downward component of 2.8 m/s²,what is the magnitude of the force on the rider by the sled?