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

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down

Acceleration: is the rate of change in

• velocity

• speed

• displacement

• direction

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

Which of the following objects is accelerating?

• A car driving in a northwest at a constant speed of 35 mph.

• A car driving southwest at a constant speed of 35 mph.

• A car driving in a circle at a constant speed of 35 mph.

  Back

• A car driving south at a constant speed of 45 mph.

A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?

• 0.7m/s²
• 7m/s²
• 14m/s²
• none of the above

What is happening in this graph from point A to B?

• The object is accelerating.
• The object is not moving.
• The object is decelerating.
• The object is moving at a constant speed.

Which graph shows the object standing still?

• A
• B
• C
• D

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find the acceleration.

• 30 m/s
• 24 m/s²
• 9 m/s²
• 81 km/hr