Unit 2: Kinematics in 2D

A  car starts from rest and after  7 seconds it is moving at 42  m/s. What is the car’s acceleration?

• 0.17
• 1.67
• 6
• 7

A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 

• 4.20 m
• 52.5 m
• 105 m
• 158 m

The SI unit for length or distance is

• foot (ft)
• inch (in)
• mile (mi)
• meter (m)

In each of the following cases, determine which car has the greatest acceleration.

• starts from 0 m/s to 20 m/s in 4 seconds.
• speed up from 20m/s to 40m/s in 3 seconds
• slow down from 50m/s to stop in 2 seconds
• starts from 0 m/s to 20m/s in 5 seconds

The rate at which distance is covered is called speed.

• True
• False

A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 

• 4.20 m
• 52.5 m
• 105 m
• 158 m

Motion sensors recorded the following data about a runner during a cross-country race. During which segment of the race did the runner have the greatest speed?

• W
• X
• Y
• Z

The ball took 0.45 s to hit the ground 0.72 m from the table. What was the horizontal velocity of the ball as it rolled off the table?

• 0 m/s
• 0.63 m/s
• 1.6 m/s
• 2.2 m/s

What would the d-t graph look like for an object travelling at a constant velocity? 

• Horizontal line
• Straight line
• Curved line

What would the v-t graph look like for an object travelling at a constant velocity? 

• Curved line
• Straight line
• Horizontal line