Force and Motion

Which object has more inertia: a fast moving car or a truck at rest?

• The car, because it has more mass.

• The car, because it is moving fast.

• The truck, because it has more mass.

• The truck, because it is at rest.

According to Newton's Second Law of Motion, acceleration is proportional to force. What will an increase in force produce?

• A decrease in acceleration.

• An increase in acceleration.

• No change in acceleration.

In which situation is an object accelerating?

• If the object is at rest.

• Only when the speed changes.

• Only when the direction changes.

• When speed or direction changes.

What two factors do speed depend on?

• Distance and Friction

• Distance and Time

• Velocity and Friction

• Velocity and Time

What is the difference between speed and velocity?

• Velocity has direction, while speed does not.

• Speed has direction, while velocity does not.

• Velocity involves time, while speed does not.

• Speed involves time, while velocity does not.

Which car traveled at an average speed of 30 km/h?

• A

• B

• C

• D

How would you describe the motion of the car for the segment B-C of this acceleration graph?

• Not moving.

• Speeding up slowly.

• Slowing down quickly.

• Moving at constant velocity.

The graph above shows the velocity of a car. Which statement best explains how the car is moving?

• Velocity is increasing, so the car is accelerating.

• Velocity is decreasing, so the car is accelerating.

• Velocity is increasing, so the car is not accelerating.

• Velocity is decreasing, so the car is not accelerating.

According to the data in the acceleration graph, which of the following conclusions can be made about the motion of object B?

• The object is moving and the acceleration is zero.

• The object is moving and the acceleration is positive.

• The object is not moving and acceleration is zero.

• The object is not moving and acceleration is positive.

Max is watching a wind up toy walking across a table. He observes that the toy covers 1 cm every second for 10 seconds. Which graph most closely represents the toy's trip across the table?

• A

• B

• C

• D