Acceleration and Velocity-Time Graphs

Acceleration: is the rate of change in

• velocity

• speed

• displacement

• direction

the unit of acceleration is

• m/s²

• m/s

• m

• s

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down

A negative acceleration means that your object is  

• constant

• speeding up

• at rest

• slowing down

A box sliding down an inclined plane from rest 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

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 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.

What kind of acceleration is shown here?

• positive
• negative
• none
• varies

What kind of acceleration is shown here?

• positive
• negative
• none
• varies

The slope of a velocity-time graph represents __________.

• acceleration

• displacement

• speed

• distance