grade 9 ( acceleration)

the unit of acceleration is

• (m/s²)

• jouls

• m

• s

A negative acceleration means that your object is  

• constant

• speeding up

• at rest

• slowing down

Acceleration: is the rate of change in

• velocity

• speed

• displacement

• direction

which isn't an example of acceleration

• When the car is speeding up.

• When the car slows down.

• When you fall off a bridge.

• no change in velocity

A bus starts from rest and accelerates to 14 m/s in 4 s. What is the average acceleration of the bus?

• 3.5 m/s2

• 5.9 m/s2

• 10.5 m/s2

• 24 m/s2

What is the formula for calculating acceleration?

• Force / Mass

• Velocity / Time

• Change in Velocity / Time

• Distance / Time

A cyclist accelerates from a standstill to 12 m/s in 3 seconds. What is the average acceleration of the cyclist?

• 4 m/s²

• 3 m/s²

• 2 m/s²

• 1 m/s²

Which of the following scenarios represents a positive acceleration?

• A car moving at a constant speed.

• A ball thrown upwards.

• A car coming to a stop.

• A train moving backwards.

What is the acceleration of an object that moves from 10 m/s to 30 m/s in 4 seconds?

• 5 m/s²

• 10 m/s²

• 15 m/s²

• 20 m/s²

If an object is experiencing a constant acceleration, what can be said about its velocity?

• It remains constant.

• It increases or decreases.

• It becomes zero.

• It oscillates.