Question 1

The term "mass" refers to the same physical concept as:

Accepted Answer

A)  weight 
B)  inertia 
C)  force 
D)  acceleration 
E)  volume 
A)  weight 
B)  inertia 
C)  force 
D)  acceleration 
E)  volume

Question 2

A book rests on a table, exerting a downward force on the table. The reaction to this force is:

Accepted Answer

A)  the force of the Earth on the book 
B)  the force of the table on the book 
C)  the force of the Earth on the table 
D)  the force of the book on the Earth 
E)  the inertia of the book 
A)  the force of the Earth on the book 
B)  the force of the table on the book 
C)  the force of the Earth on the table 
D)  the force of the book on the Earth 
E)  the inertia of the book

Question 3

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope. The force of the block on the Earth is:

Accepted Answer

A)  14 N, up 
B)  14 N, down 
C)  35 N, up 
D)  35 N, down 
E)  49 N, up 
A)  14 N, up 
B)  14 N, down 
C)  35 N, up 
D)  35 N, down 
E)  49 N, up

Question 4

The inertia of a body tends to cause the body to:

Accepted Answer

A)  speed up 
B)  slow down 
C)  resist any change in its motion 
D)  fall toward the Earth 
E)  decelerate due to friction 
A)  speed up 
B)  slow down 
C)  resist any change in its motion 
D)  fall toward the Earth 
E)  decelerate due to friction

Question 5

Two forces, one with a magnitude of 3 N and the other with a magnitude of 5 N, are applied to an object. For which orientation of the forces shown in the diagrams is the magnitude of the acceleration of the object the least?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 6

Which of the following is a correct statement of Newton's first law?

Accepted Answer

A)  An object in motion will continue in motion at a constant speed unless acted on by a net external force. 
B)  An object at rest will stay at rest unless acted on by a net internal force. 
C)  An object in motion will continue in motion at a constant velocity unless acted on by a net internal force. 
D)  An object in motion will continue in motion at a constant velocity unless acted on by a net external force. 
E)  Everything has inertia. 
A)  An object in motion will continue in motion at a constant speed unless acted on by a net external force. 
B)  An object at rest will stay at rest unless acted on by a net internal force. 
C)  An object in motion will continue in motion at a constant velocity unless acted on by a net internal force. 
D)  An object in motion will continue in motion at a constant velocity unless acted on by a net external force. 
E)  Everything has inertia.

Question 7

A 5-kg block is suspended by a rope from the ceiling of an elevator that accelerates downward at 3.0 m/s2. The tension force of the rope on the block is:

Accepted Answer

A)  15 N, up 
B)  34 N, up 
C)  34 N, down 
D)  64 N, up 
E)  64 N, down 
A)  15 N, up 
B)  34 N, up 
C)  34 N, down 
D)  64 N, up 
E)  64 N, down

Question 8

A heavy ball is suspended as shown. A quick jerk on the lower string will break that string but a slow pull on the lower string will break the upper string. The first result occurs because:

Accepted Answer

A)  the force is too small to move the ball 
B)  action and reaction is operating 
C)  the ball has inertia 
D)  air friction holds the ball back 
E)  the ball has too much energy 
A)  the force is too small to move the ball 
B)  action and reaction is operating 
C)  the ball has inertia 
D)  air friction holds the ball back 
E)  the ball has too much energy

Question 9

A circus performer of weight W is walking along a "high wire" as shown. The tension in the wire is:

Accepted Answer

A)  approximately W 
B)  approximately W/2 
C)  much less than W 
D)  much more than W 
E)  depends on whether he stands on one or two feet 
A)  approximately W 
B)  approximately W/2 
C)  much less than W 
D)  much more than W 
E)  depends on whether he stands on one or two feet

Question 10

Two blocks are connected by a massless string that passes over a massless pulley, as shown. In the absence of friction, how does the tension force exerted by the string on the 250 N block compare with the tension force exerted by the string on the 350 N block?

Accepted Answer

A)  The force on the 250 N block is smaller by a factor of 0.71. 
B)  The force on the 250 N block is larger by a factor of 1.4. 
C)  The force on the 250 N block is always equal to its weight. 
D)  The force on the 250 N block is equal to the weight of the 350 N block. 
E)  The two forces are equal. 
A)  The force on the 250 N block is smaller by a factor of 0.71. 
B)  The force on the 250 N block is larger by a factor of 1.4. 
C)  The force on the 250 N block is always equal to its weight. 
D)  The force on the 250 N block is equal to the weight of the 350 N block. 
E)  The two forces are equal.

Question 11

You stand on a spring scale on the floor of an elevator. Of the following, the scale shows the highest reading when the elevator:

Accepted Answer

A)  moves downward with increasing speed 
B)  moves downward with decreasing speed 
C)  remains stationary 
D)  moves upward with decreasing speed 
E)  moves upward at constant speed 
A)  moves downward with increasing speed 
B)  moves downward with decreasing speed 
C)  remains stationary 
D)  moves upward with decreasing speed 
E)  moves upward at constant speed

Question 12

Which of the following is true, according to Newton's second law?

Accepted Answer

A)  The acceleration of an object is proportional to its mass and inversely proportional to the net force on it. 
B)  The acceleration of an object is proportional to the product of its mass and the net force on it. 
C)  The acceleration of an object is proportional to the net force on it and inversely proportional to its mass. 
D)  The acceleration of an object is equal to the net force on it. 
E)  The acceleration of an object depends on all the forces on it, both internal and external. 
A)  The acceleration of an object is proportional to its mass and inversely proportional to the net force on it. 
B)  The acceleration of an object is proportional to the product of its mass and the net force on it. 
C)  The acceleration of an object is proportional to the net force on it and inversely proportional to its mass. 
D)  The acceleration of an object is equal to the net force on it. 
E)  The acceleration of an object depends on all the forces on it, both internal and external.

Question 13

An object rests on a horizontal frictionless surface. A net horizontal force of magnitude F is applied. This force produces an acceleration:

Accepted Answer

A)  only if F is larger than the weight of the object 
B)  only while the object suddenly changes from rest to motion 
C)  always 
D)  only if the inertia of the object decreases 
E)  only if F is increasing 
A)  only if F is larger than the weight of the object 
B)  only while the object suddenly changes from rest to motion 
C)  always 
D)  only if the inertia of the object decreases 
E)  only if F is increasing

Exam 5: Force and Motion I

The term "mass" refers to the same physical concept as:

A book rests on a table, exerting a downward force on the table. The reaction to this force is:

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope. The force of the block on the Earth is:

The inertia of a body tends to cause the body to:

Two forces, one with a magnitude of 3 N and the other with a magnitude of 5 N, are applied to an object. For which orientation of the forces shown in the diagrams is the magnitude of the acceleration of the object the least?

Which of the following is a correct statement of Newton's first law?

A 5-kg block is suspended by a rope from the ceiling of an elevator that accelerates downward at 3.0 m/s2. The tension force of the rope on the block is:

A heavy ball is suspended as shown. A quick jerk on the lower string will break that string but a slow pull on the lower string will break the upper string. The first result occurs because:

A circus performer of weight W is walking along a "high wire" as shown. The tension in the wire is:

Two blocks are connected by a massless string that passes over a massless pulley, as shown. In the absence of friction, how does the tension force exerted by the string on the 250 N block compare with the tension force exerted by the string on the 350 N block?

You stand on a spring scale on the floor of an elevator. Of the following, the scale shows the highest reading when the elevator:

Which of the following is true, according to Newton's second law?

An object rests on a horizontal frictionless surface. A net horizontal force of magnitude F is applied. This force produces an acceleration:

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Circuits

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Images

Interference

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

All About Atoms

Conduction of Electricity in Solids

Nuclear Physics

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

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A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s² by means of a rope. The force of the block on the Earth is:

A 5-kg block is suspended by a rope from the ceiling of an elevator that accelerates downward at 3.0 m/s². The tension force of the rope on the block is: