Physics Unit 2 Review

A ball is released from rest and accelerates in the positive direction down an inclined plane as shown by the graph below.

Refer to the information and graph shown above. What is the velocity of the ball at t = 4 s?

• 2.5 m/s

• 5.0 m/s

• 10 m/s

• 20 m/s

According to the information and graph above, which best describes the motion of the ball?

• Constant velocity

• Increasing velocity

• Decreasing velocity

• Need more information

A ball rolls down a ramp toward a motion detector as shown below.

Observe the information and diagram above. Based on your understanding of the forces and expected motion of the ball, which of the graphs below best represents the relationship between position and time?

• 
• 
• 
• 

Answer explanation

It is going down

The graph below represents the motion of a car travelling horizontally along a straight stretch of road in the positive direction.

Refer to the information and graph shown above. Which best describes the magnitude of the velocity for the car?

• Constant

• Increasing

• Decreasing

• None of these

Answer explanation

This is a position vs time graph.

Therefore, the line represent a constant velocity.

If it was curved line going up than it would represent an increase in velocity. Vice versa if it was a curved line going down would be negative.

The graph below represents the motion of a car travelling horizontally along a straight stretch of road in the positive direction.

According to the information and graph above, what is the displacement of the car between t = 1 s and t = 4 s?

• 0 m

• 5 m

• 15 m

• 20 m

The graph below represents the motion of a car travelling horizontally along a straight stretch of road in the positive direction.

Refer to the information and graph shown above. What is the average acceleration of the car during the time interval shown?

Answer explanation

If Velocity is constant than the acceleration is 0.

If Velocity is increasing than the acceleration is increasing.

If Velocity is decreasing than the acceleration is decreasing.

Two students walk toward each other at constant velocity as shown in the position v. time graph below.

According to the information and graph shown above, what does the intersection of the two graphs represent?

• The students have equivalent velocities.

• The students have reversed direction and are heading back toward the origin.

• The students have equivalent displacements.

• None of these

A cyclist is traveling along a level, straight road at 10 m/s in the positive direction with a xi = 0. The magnitude of the velocity for the cyclist is tracked using the following motion graph.

The graph above represents the motion of a cyclist. Which of the following best describes the motion of the cyclist between t = 0 s and t = 2 s?

• The cyclist reversed direction.

• The cyclist decreased the magnitude of velocity.

• The cyclist increased the magnitude of velocity.

• The cyclist remained at constant velocity.

Answer explanation

If Velocity is constant, straight line, than the acceleration is 0.

If Velocity is increasing than the acceleration is increasing.

If Velocity is decreasing than the acceleration is decreasing.

A cyclist is traveling along a level, straight road at 10 m/s in the positive direction with a xi = 0. The magnitude of the velocity for the cyclist is tracked using the following motion graph.

According to the information and graph shown above, what is the magnitude of the acceleration for the first two seconds?

An object initially at rest moves according to the velocity - time graph shown below.

Refer to the information and graph above. Which of the following time intervals demonstrates constant velocity?

• 0 s to 1 s

• 1 s to 2 s

• 3 s to 4 s

• 4 s to 5 s

Answer explanation

If Velocity is constant, straight line horizontal, than the acceleration is 0.

If Velocity is increasing, straight line diagonal up, than the acceleration is increasing.

If Velocity is decreasing, straight line diagonal down, than the acceleration is decreasing.