Work and simple machines

Work and simple machines

7th Grade

29 Qs

quiz-placeholder

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Work and simple machines

Work and simple machines

Assessment

Quiz

Science

7th Grade

Hard

NGSS
MS-PS3-5, MS-PS3-2, MS-PS3-3

+2

Standards-aligned

Created by

Brittany Schiele

Used 9+ times

FREE Resource

29 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is work?

the transfer of energy that occurs when a force is applied over a distance

the force that draws things to the earth

the force that generates thermal energy

the transfer of energy that occurs due to friction

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is power?

W=Fd

the rate at which work is done

How efficient a machine is

MA=output force/input force

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Lifting a stone block 146m to the top of the Great Pyramid required 146,000J of work. How much work was done to lift the block halfway to the top?

36.5 N

73,000J

146,000 W

292,000%

Tags

NGSS.MS-PS3-2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Is working being done when HOLDING a suit case

Yes

No

25J

10W

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A motor applies a 5000-N force and raises an elevator 10 stories. If each story is 4M tall, how much work does the motor do?

75W

3.3333%

200,000J

24 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the power in wats, needed to mow a lawn in 50 minutes. If the work required is 500,000J.

10 W

20 W

30%

30W

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the equation for efficiency?

output work / input work x 100

output force + input force X Work

Input work/ output work

MA = output force/input force

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