PS Unit Two Review & Practice

Judy’s brand new red Lamborghini car travels 280 kilometers in 4 hours. What is its average speed?

• a. 280 km/hr
• b. 140 km/hr
• c. 1120 m/hr
• d. 70 km/hr

Aidan is an amazing skateboarder. He accelerates off a jump from rest to 35 m/s in 5 seconds. What is his acceleration?

• a. 40 m/s2
• b. 30 m/s2
• c. 175 m/s2
• d. 7 m/s2

An approaching storm is moving at 15 km/hr. What else do you need to know its velocity?

• a. temperature
• b. direction
• c. acceleration
• d. speed

Cathy is in an airplane that takes off from Boston for the 980 km trip to Detroit. The plane lands two hours later. Which of the following best describes the average speed and direction of the airplane’s flight?

• a. 325 km/h W
• b. 490 km/h W
• c. 980 km/hr W
• d. 1960 km/h W

The graph below shows distance to time for one of Anna’s swimming races. What is Anna’s average speed?

• a. 2 m/s
• b. 6 m/s
• c. 8 m/s
• d. 72 m/s

Which car traveled the slowest?

• a. Car #1
• b. Car #2
• c. Car #3
• d. Car #4
• e. Car #1 and Car #2

A shopper walks eastward 5.4 meters and then westward 8.9 meters. What is the shopper's displacement?

• 3.5m West
• 14.3m
• 3.5m East
• 14.3m West
• 14.3m East

A dog walks 12 meters to the east and then 16 meters back to the west. What is the dog's displacement?

• 4 m West
• 28 m
• 4 m
• 28 m East
• 28m West

Which car won the race?

• a. Car #1
• b. Car #2
• c. Car #3
• d. Car #4
• e. It was a tied race.

A dog walks 12 meters to the east and then 16 meters back to the west. For this motion, what is the distance moved?

• 28 m
• 4 m
• 4 m West
• 28 m East
• 28m West