Work and Power

Question 1

Which statements describe a situation in which work is being done? Select three options.A mover carries a box up a flight of stairs.A mover holds a box with an upward force while moving it horizontally.Wind blows against a steel table anchored to the ground.Wind blows a pool chair across the yard.A weightlifter lifts a barbell off the ground.A weightlifter holds a barbell above the head.

Revolt · Accepted Answer

A mover carries a box up a flight of stairs.; Wind blows a pool chair across the yard.; A weightlifter lifts a barbell off the ground.

Question 2

✔ ABCThey all require the same amount of work.

Revolt · Accepted Answer

✔ A

Question 3

Question 3

Revolt · Accepted Answer

12

Question 4

Question 4

Revolt · Accepted Answer

3

Question 5

Read each scenario below. Then select the answer choices that complete the sentences.

Revolt · Accepted Answer

A car engine has power than a horse because a car engine does the same amount of work in time.: more; Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3: less; Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3: more

Question 6

Read each scenario below. Then select the answer choices that complete the sentences.

Revolt · Accepted Answer

✔ more; A car engine has power than a horse because a car engine does the same amount of work in time.: more; A car engine has power than a horse because a car engine does the same amount of work in time.: less; Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3: less; Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3: more

Question 7

✔ lessmorethe same

Revolt · Accepted Answer

✔ less

Question 8

less✔ morethe same

Revolt · Accepted Answer

✔ more

Question 9

✔ lessX morethe same

Revolt · Accepted Answer

✔ less

Question 10

ABC✔ They all use the same amount of power.

Revolt · Accepted Answer

✔ They all use the same amount of power.

Work and Power Answers

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