Chapter 2 practice

Which graph shows the object standing still?

• A
• B
• C
• D

Match the following graphs to the right description.

• No acceleration (constant velocity)

• 
• Slowing down

• 
• Speeding up

• 

Toon Train is traveling at the speed of 10 m/s at the top of the hill. 5 seconds later it reaches the boom of the hill and is moving at a speed of 30 m/s. What is the rate of Acceleration for the Toon Train?

• 0.25 m/s²

• 4 m/s²

• 4 meters

• 100 m/s²

During which segment did the car travel back toward its starting position?

• Segment A to B

• Segment B to C

• Segment C to D

• Segment D to E

If a battery-powered car can accelerate at 14.0 m/s², how fast will it be going after 3.2 s if it started from 0.0 m/s?

• 4.375 m/s

• 10.8 m/s

• 14.0 m/s

• 44.8 m/s

Acceleration

• How fast an object changes position

• Stationary object used to determine motion

• A change in an object’s velocity: speed or direction

• Speed that does not change

Speed

• How fast an object changes position

• Stationary object used to determine motion

• A change in an object’s velocity: speed or direction

• Speed that does not change

A description of the speed and direction of an object's motion

• Velocity
• Speed
• Acceleration
• Vector

The rate at which velocity changes is called

• speed
• direction
• acceleration
• motion

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