Module 2-3 Review (Acceleration)

A car is moving north at 60 km/h. What information is needed to describe its velocity?

• Both its speed and direction

• Only its speed

• Only its color

• Only its mass

When does an object accelerate?

• When its velocity changes

• When it stays at rest

• When its mass increases

• When it moves in a circle at constant speed

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Based on the diagram, what does it show about the directions of acceleration and velocity when a car is speeding up?

• Both are in the same direction

• Acceleration is opposite to velocity

• Acceleration is upward, velocity is forward

• Both are in random directions

A car is moving in a circular path at constant speed. What can you say about the direction of its acceleration compared to its velocity?

• Acceleration is always in the same direction as velocity.

• Acceleration is always in the opposite direction to velocity.

• Acceleration is directed toward the center of the circle, not in the same or opposite direction as velocity.

• Acceleration is zero.

What does the slope of a speed-time graph represent for an object traveling in a straight line?

• The distance traveled by the object

• The acceleration of the object

• The mass of the object

• The direction of motion

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What is the formula to calculate an object's acceleration?

• Final velocity divided by initial velocity

• Change in velocity divided by the change of the time interval

• Initial velocity multiplied by time

• Speed divided by distance

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What is centripetal acceleration?

• Acceleration toward the center of a curved or circular path

• Acceleration away from the center of a circular path

• Acceleration in a straight line

• Acceleration that never changes direction

Which of the following statements is true about a thrown ball and a dropped ball released from the same height at the same time?

• The thrown ball will hit the ground before the dropped ball.

• The dropped ball will hit the ground before the thrown ball.

• Both balls will hit the ground at the same time.

• The thrown ball will never hit the ground.

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What is the main difference in the motion of a ball thrown horizontally compared to a ball that is simply dropped from the same height?

• The thrown ball travels a greater vertical distance.

• The dropped ball travels a greater horizontal distance.

• The thrown ball travels a greater horizontal distance.

• Both balls travel the same horizontal distance.

Why do a thrown ball and a dropped ball hit the ground at the same time when released from the same height?

• Because gravity acts equally on both balls in the vertical direction.

• Because the thrown ball is heavier.

• Because the dropped ball is lighter.

• Because air resistance is stronger on the thrown ball.

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