Front

What does it mean when an object is at rest?

Back

An object is at rest when it is not moving and its speed is 0 m/s.

Front

Define constant speed.

Back

Constant speed means an object is moving at the same speed over time, without speeding up or slowing down.

Front

What is positive acceleration?

Back

Positive acceleration occurs when an object is speeding up, meaning its velocity is increasing.

Front

What does it mean for an object to be accelerating?

Back

An object is accelerating when it is changing its speed or direction over time.

Front

What is deceleration?

Back

Deceleration is a form of acceleration where an object is slowing down, resulting in a decrease in speed.

Front

How do you calculate acceleration?

Back

Acceleration can be calculated using the formula: a = (final velocity - initial velocity) / time.

Front

If a bus is moving at a constant speed of 10 m/s for 5 seconds, what is its acceleration?

Back

The acceleration is 0 m/s² because the speed is constant.

Front

What is the unit of acceleration?

Back

The unit of acceleration is meters per second squared (m/s²).

Front

If a car starts from rest and reaches a speed of 20 m/s in 3.5 seconds, what is its acceleration?

Back

The acceleration is 5.7 m/s².

Front

What does it mean when an object is decelerating?

Back

It means the object is slowing down, which is a negative acceleration.