Acceleration

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time.

Front

What is the formula for average acceleration?

Back

Average acceleration = (final velocity - initial velocity) ÷ time.

Front

If an object is moving at a constant speed, does it have acceleration?

Back

No, an object moving at a constant speed in a straight line has zero acceleration.

Front

What is the unit of acceleration in the International System of Units (SI)?

Back

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

Front

How do you calculate acceleration if you know the initial and final velocities and the time taken?

Back

Acceleration = (final velocity - initial velocity) ÷ time.

Front

A drag racer accelerates from 0 m/s to 200 m/s in 5 seconds. What is the acceleration?

Back

40 m/s².

Front

A roller coaster accelerates from 6.0 m/s to 70 m/s over 4 seconds. What is the acceleration?

Back

16 m/s².

Front

If a golf ball rolls up a hill with an initial speed of 2 m/s and slows at a rate of 0.5 m/s², what is its velocity after 2 seconds?

Back

1 m/s.

Front

What does a negative acceleration indicate?

Back

Negative acceleration indicates that an object is slowing down.

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.