PS A Final Exam Review Part A

If Gabrielle walks all three sides of the path in 300 seconds, what is her average speed around the path in meters per second?  

• 0.5

• 0.7

• 1.5

• 2.0

Use the graph below to answer any questions that follow. The graph represents the motion of an object. In which section of the graph is acceleration the greatest? 

• A-B

• B-C

• C-D

• D-E

A car travels northward on a straight stretch of highway. The graph below shows the velocity of the car during a 20-second time interval. Use the graph to answer any questions that follow. What is the acceleration of the car during interval AB? 

• 0.4 m/s2

• 2.5 m/s2

• 10 m/s2

• 40 m/s2

A boat with a jet engine demonstrates Newton's law of action-reaction. Why is this true?

• As the boat expels exhaust backward, the boat moves forward.

• As the boat expels exhaust backward and forward, the boat remains stationary. 

• As the boat expels exhaust forward, the boat remains stationary.

• As the boat expels exhaust forward, the boat moves forward.

The graph below represents the speed with respect to time t of four cars traveling on a straight road. Use the graph to answer any questions that follow. 

Which car is decelerating? 

• Q

• R

• S

• T

An object of mass 2 kilograms is falling freely near Earth's surface. Which of the following options best approximates the magnitude of the gravitational force that Earth exerts on the object? 

• 0.0 N

• 0.2 N

• 2 N

• 20 N

The same object is dropped from the same height on Earth and on the Moon. The table shows the gravitational force on the object in both locations. Why is the gravitational force different in each location? 

•  The Moon has more mass and gravity than Earth does.

• Earth has less acceleration due to less gravity than the Moon.

• Earth has more acceleration due to more gravity than the Moon.

• The mass of the object is different on Earth than on the Moon.

Maria dropped four different objects in a vacuum. The graph shows the data she collected. Which statement best describes the data Maria found? 

• The mass of each object is dependent on the gravitational force.

• The mass of each object increases as gravitational force decreases.

• The gravitational force each object experiences decreases as mass increases.

• The gravitational force each object experiences is dependent on the object's mass.

What will happen to the mass of a ball if it is moved from Earth to the Moon?  

•  The mass will increase.

• The mass will decrease. 

• The mass will not exist.

• The mass will remain the same.

A satellite is launched from Earth into orbit. What happens to the mass and weight of the satellite?

•  The mass decreases, but the weight stays constant.

• The mass stays constant, but the weight decreases. 

• The mass stays constant, but the weight increases. 

•  The mass increases, but the weight decreases.