Acceleration

The rate that a car's velocity changes is its

• speed

• force

• gravity

• acceleration

Acceleration is defined as the CHANGE in 

• the time it takes for one place to move to another place. 

• the mass of an object divided by the time interval.

• the distance divided by the time interval 

• the velocity divided by the time interval 

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

Which of the following is an example of deceleration?

• a car approaching a stop sign and slowing down

• a plane increasing speed down the runway and then taking flight

• a roller coaster moving down a steep hill 

• an airplane cruising in a straight flight plan

The SI unit for acceleration is

• mph
• ft/sec²
• m/s²

In Physics, acceleration can occur when:

• an object speeds up or slows down.

• only when a car speeds up.

• only when a car slows down.

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

Determine the motion of the car.

• at rest 
• moving at constant speed
• speeding up
• slowing down

Determine the motion of the car.

• at rest 
• constant velocity 
• speeding up
• slowing down

Which graph represents the greatest acceleration?

• A
• B
• C
• D