Ch. 3 Physics Review

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval 

Why does a car accelerate as it round a corner at a constant speed?

• Its direction changes
• It doesn't
• It slows down
• Its speeds up  

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

Which graph represents zero acceleration (constant velocity)?

• A
• B
• C
• D

What happened during C to D point?

• not moving
• increasing speed at a constant rate
• moving at a constant speed
• moving at 0 m/s² acceleration

On a velocity-time graph, what does the slope tell us?

• The distance traveled
• The average velocity
• The acceleration
• Nothing useful

The direction-sensitive change in position of a system between two distinct points is called its

• distance

• displacement

• speed

• velocity

One common example of uniformly accelerated motion is

• free fall

• launching in a rocket

• rolling down a hill

• sitting still

The speedometer on your car measures

• average speed

• instantaneous speed

• average velocity

• instantaneous velocity