Unit 4 Re-Test

Front

What does it mean when an object is accelerating?

Back

Acceleration refers to the rate of change of velocity of an object. It can mean an increase in speed, a decrease in speed (deceleration), or a change in direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What does a straight diagonal line on a distance-time graph indicate?

Back

A straight diagonal line indicates a constant speed, meaning that distance is increasing at a steady rate over time.

Front

What is meant by 'at rest' in motion?

Back

An object is 'at rest' when it is not changing its position relative to a reference point.

Front

What is deceleration?

Back

Deceleration is a decrease in speed or a negative acceleration, meaning the object is slowing down.

Front

What is a change in motion?

Back

A change in motion refers to any alteration in the speed, direction, or state of an object.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What does it mean for an object to be in constant speed?

Back

An object is in constant speed when it covers equal distances in equal intervals of time, regardless of the direction.

Front

What is the significance of acceleration in everyday life?

Back

Acceleration is significant as it affects how vehicles speed up, slow down, and change direction, impacting safety and efficiency.

Front

How can you identify if an object is accelerating?

Back

You can identify if an object is accelerating by observing changes in its speed or direction over time.