Speed, Velocity, 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

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.

Velocity has two components

(pick 2 below)

• direction

• change in speed

• speed up

• slow down

If you are test-driving a Bugatti Veyron and you go from 0 km/s to 124 km/s in 3.7 seconds, what was your acceleration?

• 33.5 m/s²
• 0.03 m/s²
• -33.5 m/s²
• -0.03 m/s²

What is the final velocity of a rocket that travels for 4 seconds, has an initial velocity of 12 km/s and an acceleration of 2 km/s²?

• -4 km/s

• 10 km/s

• 20 km/s

• -10 km/s

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds

• 35 seconds

• 0.3 seconds

• 3.3 seconds

The picture of the position vs. time graph shows an object that is...

• accelerating/speeding up
• moving at a constant speed 
• not moving 
• accelerating/slowing down.