Question 1

An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be

Accepted Answer

A)  less than than the weight of the elevator. 
B)  equal to the weight of the elevator. 
C)  greater than the weight of the elevator. 
A)  less than than the weight of the elevator. 
B)  equal to the weight of the elevator. 
C)  greater than the weight of the elevator.

Question 2

A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a rope that goes over an ideal pulley. If the masses are gently released from rest, how long does it take for the 3.0-kg mass
To rise by 1.0 m?

Accepted Answer

A)  0.41 s 
B)  0.74 s 
C)  0.90 s 
D)  0.82 s 
E)  1.8 s 
A)  0.41 s 
B)  0.74 s 
C)  0.90 s 
D)  0.82 s 
E)  1.8 s

Question 3

As shown in the figure, a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg block that is hanging over the edge of the table. What is the magnitude
Of the acceleration of the 10-kg block when the other block is gently released?

Accepted Answer

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

Question 4

If you pound a feather with a hammer, which one feels a greater force?

Accepted Answer

A)  If the feather moves, then it felt the greater force. Otherwise the force was the same on both. 
B)  always the feather 
C)  always the hammer 
D)  The size of the force is always exactly the same on both of them. 
A)  If the feather moves, then it felt the greater force. Otherwise the force was the same on both. 
B)  always the feather 
C)  always the hammer 
D)  The size of the force is always exactly the same on both of them.

Question 5

The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in
The pulley, and the connecting rope is very light.

Accepted Answer

A)  13 kg 
B)  16 kg 
C)  14 kg 
D)  11 kg 
A)  13 kg 
B)  16 kg 
C)  14 kg 
D)  11 kg

Question 6

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at $15 ^ { \circ }$ away from the vertical toward the front of the plane.
Using this observation, you can conclude that the airplane is

Accepted Answer

A)  not accelerating because the string is at rest. 
B)  moving forward. 
C)  accelerating forward. 
D)  moving backward. 
E)  accelerating backward. 
A)  not accelerating because the string is at rest. 
B)  moving forward. 
C)  accelerating forward. 
D)  moving backward. 
E)  accelerating backward.

An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be

A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a rope that goes over an ideal pulley. If the masses are gently released from rest, how long does it take for the 3.0-kg mass To rise by 1.0 m?

As shown in the figure, a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg block that is hanging over the edge of the table. What is the magnitude Of the acceleration of the 10-kg block when the other block is gently released?

If you pound a feather with a hammer, which one feels a greater force?

The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in The pulley, and the connecting rope is very light.

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at $15 ^ { \circ }$ away from the vertical toward the front of the plane. Using this observation, you can conclude that the airplane is

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two Dimensions; Vectors

Circular Motion; Gravitation

Work and Energy

Linear Momentum

Rotational Motion

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations and Waves

Sound

Temperature and Kinetic Theory

Heat

The Laws of Thermodynamics

Electric Charge and Electric Field

Electric Potential

Electric Currents

Dc Circuits

Magnetism

Electromagnetic Induction and Faradays Law

Electromagnetic Waves

Light: Geometric Optics

The Wave Nature of Light

Optical Instruments

The Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy; Effects and Uses of Radiation

Elementary Particles

Astrophysics and Cosmology

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Exam 4: Dynamics: Newtons Laws of Motion

An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the cable must be

A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a rope that goes over an ideal pulley. If the masses are gently released from rest, how long does it take for the 3.0-kg mass To rise by 1.0 m?

As shown in the figure, a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg block that is hanging over the edge of the table. What is the magnitude Of the acceleration of the 10-kg block when the other block is gently released?

If you pound a feather with a hammer, which one feels a greater force?

The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in The pulley, and the connecting rope is very light.

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at 15∘15 ^ { \circ }15∘ away from the vertical toward the front of the plane. Using this observation, you can conclude that the airplane is

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two Dimensions; Vectors

Circular Motion; Gravitation

Work and Energy

Linear Momentum

Rotational Motion

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations and Waves

Sound

Temperature and Kinetic Theory

Heat

The Laws of Thermodynamics

Electric Charge and Electric Field

Electric Potential

Electric Currents

Dc Circuits

Magnetism

Electromagnetic Induction and Faradays Law

Electromagnetic Waves

Light: Geometric Optics

The Wave Nature of Light

Optical Instruments

The Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy; Effects and Uses of Radiation

Elementary Particles

Astrophysics and Cosmology

Filters

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at $15 ^ { \circ }$ away from the vertical toward the front of the plane. Using this observation, you can conclude that the airplane is