Question 1

You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is

Accepted Answer

A)  the push of box G on box H. 
B)  the push of box H on box G. 
C)  the push of box G against you. 
D)  the upward force of the floor n box G. 
E)  the acceleration of box G. 
A)  the push of box G on box H. 
B)  the push of box H on box G. 
C)  the push of box G against you. 
D)  the upward force of the floor n box G. 
E)  the acceleration of box G.

Question 2

A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?

Accepted Answer

A)  more than 700 N 
B)  less than 700 N 
C)  700 N 
D)  It could be more or less than 700 N, depending on whether the elevator is going up or down. 
A)  more than 700 N 
B)  less than 700 N 
C)  700 N 
D)  It could be more or less than 700 N, depending on whether the elevator is going up or down.

Question 3

When a 45-kg person steps on a scale in an elevator, the scale reads a steady 410 N. Which of the following statements must be true? (There could be more than one correct choice.)

Accepted Answer

A)  The elevator is accelerating upward at a constant rate. 
B)  The elevator is accelerating downward at a constant rate. 
C)  The elevator is moving upward at a constant rate. 
D)  From the given information, we cannot tell if the elevator is moving up or down. 
A)  The elevator is accelerating upward at a constant rate. 
B)  The elevator is accelerating downward at a constant rate. 
C)  The elevator is moving upward at a constant rate. 
D)  From the given information, we cannot tell if the elevator is moving up or down.

Question 4

A 20-ton truck collides with a 1500-lb car. Which of the following statements must be true?

Accepted Answer

A)  During the collision, the force on the truck is greater then the force on the car. 
B)  During the collision, the force on the truck is equal to the force on the car. 
C)  During the collision, the force on the truck is smaller than the force on the car. 
D)  The truck did not slow down during the collision, but the car did. 
E)  The car did not slow down during the collision, but the truck did. 
A)  During the collision, the force on the truck is greater then the force on the car. 
B)  During the collision, the force on the truck is equal to the force on the car. 
C)  During the collision, the force on the truck is smaller than the force on the car. 
D)  The truck did not slow down during the collision, but the car did. 
E)  The car did not slow down during the collision, but the truck did.

You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is

A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?

When a 45-kg person steps on a scale in an elevator, the scale reads a steady 410 N. Which of the following statements must be true? (There could be more than one correct choice.)

A 20-ton truck collides with a 1500-lb car. Which of the following statements must be true?

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Applying Newtons Laws

Gravity

Rotational Motion

Equilibrium Ad Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

EM Induction and Em Waves

AC Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

Exam 4: Forces and Newtons Laws of Motion

You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is

A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?

When a 45-kg person steps on a scale in an elevator, the scale reads a steady 410 N. Which of the following statements must be true? (There could be more than one correct choice.)

A 20-ton truck collides with a 1500-lb car. Which of the following statements must be true?

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Applying Newtons Laws

Gravity

Rotational Motion

Equilibrium Ad Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

EM Induction and Em Waves

AC Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters