Work and Power — Quiz

Question 1

In which scenario is the least amount of work done on a crate?

Revolt · Accepted Answer

A force of 130 N moves it 22 m.

Question 2

How is power calculated?

Revolt · Accepted Answer

divide work by time

Question 3

How do the units of work and power compare?

Revolt · Accepted Answer

The unit for work is a joule. The unit for power is a watt, which is a joule per second.

Question 4

A force of 75 cap n at an angle of 15 degrees to the direction of motion moves a chair 3 m Which change would result in more work being done on the chair?

Revolt · Accepted Answer

decreasing the angle to 10 degrees

Question 5

Hiro walks up a flight of stairs in his apartment building. Later in the day, he runs up the same flight of stairs. Which statement about work and power describes Hiro’s actions?

Revolt · Accepted Answer

He had more power running than walking.

Question 6

Which statement about work and power correctly describes an automobile race?

Revolt · Accepted Answer

The car that finishes last has the lowest power.

Question 7

A load of bricks is lifted to the second floor of a building. How do work and power relate to this job?

Revolt · Accepted Answer

The faster the job is done, the greater the power.

Question 8

Question 8

Revolt · Accepted Answer

[Dropdown 1] power; power

Question 9

Lester prepares to lift a heavy sack of flour into a customer’s shopping cart. During which part of the action does Lester do work?

Revolt · Accepted Answer

as he lifts the sack to his chest from the floor

Question 10

In which scenario is an animal doing work? Choose three correct answers.

Revolt · Accepted Answer

A cat lifts up her kitten by its neck.; A bird flies a worm from the ground to its nest in a tree.; A horse pulls a wagon along a road.

Work and Power — Quiz Answers

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