Speed, Acceleration, and Momentum - Mary Ellison | Laabri

10

Which best describes average speed?

A: The rate at which an object is traveling at a given time.

B: The rate at which an object travels over a period of time.

C: A change in the motion of an object.

D: A distance between two objects over time.

10

Look at the distance-time graph above. What is the total distance traveled?

A: 100 cm

B: 5 cm

C: 3 cm

D: 50 cm

10

Refer to the graph above again. Over what period of time does the motion occur?

A: 5 s

B: 100 s

C: 20 s

D: 3 s

10

Look at the graph above. Given that speed = distance / time, calculate the speed of the object. Show your work in the space below.

10

A kayaker paddles along a river for four hours. In that time, she manages to move a total of 20 miles. What is the average speed of the kayak for this trip?

A: 20 mph

B: 4 mph

C: 5 mph

D: 16 mph

10

What is acceleration? Type a definition for this term in your own words.

10

What is the formula for acceleration? Make sure your answer includes a key explaining what a, vf, vi, and t stand for.

10

A ball begins rolling down a hill. After 5 seconds, its velocity is 10 meters per second. What is the acceleration of the ball? See page 346 in your book for help!

A: 5 m/s/s

B: 10 m/s/s

C: 15 m/s/s

D: 2 m/s/s

10

A vehicle brakes from 30mph to 5 mph over a period of 10 seconds. What is the vehicles acceleration?

A: There is no acceleration, it is slowing down!

B: 2.5 m/s/s

C: -2.5 m/s/s

D: 150 m/s/s

10

Over which time period does positive acceleration occur?

A: 3-5 s

B: 1-3 s

C: 5-6 s

D: 6-10 s

10

Over which time period does negative acceleration occur?

A: 0-1s

B: 3-5s

C: 5-6s

D: 6-10s

10

What is the formula for momentum? Be sure to include a key showing what p, m, and v stand for.

10

Which has the most momentum?

A: A 1 g object at 100 m/s

B: A 100 g object at 1 m/s

C: Both have the same momentum

D: Neither has any momentum.

10

Which has the most momentum?

A: 50 kg object at 5 m/s

B: 100 kg object at 10 m/s

C: 150 g object at 5 m/s

D: 200 kg object at 2 m/s