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8B-2 Work, Power, and Machines

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

The number of times a machine multiplies force is called___.

a)

mechanical advantage

b)

mechanical efficiency

c)

power

d)

work

2.

A machine's ability to convert your input into work is called ___.

a)

mechanical advantage

b)

mechanical efficiency

c)

power

d)

work

3.

A ___ is a bar that rotates on a fixed point.

a)

inclined plane

b)

screw

c)

wheel and axle

d)

lever

4.

A ___ is a lever that rotates around 360o.

a)

inclined plane

b)

screw

c)

wheel and axle

d)

pulley

5.

A ___ is a grooved wheel with a rope running through it.

a)

wedge

b)

screw

c)

wheel and axle

d)

pulley

6.

A ___ is a slanted surface that spreads work out over a longer distance.

a)

wedge

b)

screw

c)

inclined plane

d)

pulley

7.

A ___ is a double inclined plane that moves.

a)

wedge

b)

screw

c)

inclined plane

d)

pulley

8.

A ___ is an inclined plane wrapped around a spiral.

a)

wheel and axle

b)

screw

c)

inclined plane

d)

pulley

9.

You make a calculation and the result is 2.5


What did you calculate?

a)

Work

b)

Power

c)

Mechanical Advantage

d)

Mechanical Efficiency

10.

You make a calculation and the result is 75%


What did you calculate?

a)

Work

b)

Power

c)

Mechanical Advantage

d)

Mechanical Efficiency

11.

Which measurement is the Fin?

a)

3 m

b)

7 m

c)

25 N

d)

6 N

12.

Which measurement is the Fout?

a)

2 m

b)

0.75 m

c)

8 N

d)

18 N

13.

Which measurement is the din?

a)

2 m

b)

3 m

c)

30 N

d)

75 N

14.

Which measurement is the dout?

a)

3 m

b)

1 m

c)

9 N

d)

4 N

15.

Which class of lever is this?

a)

1st

b)

2nd

c)

3rd

16.

Which class of lever is this?

a)

1st

b)

2nd

c)

3rd

17.

Which class of lever is this?

a)

1st

b)

2nd

c)

3rd

18.

Which class of lever is this?

a)

1st

b)

2nd

c)

3rd

19.

Which type of friction does this picture represent?

a)

Rolling

b)

Fluid

c)

Sliding

d)

Static

20.

Which type of friction does this picture represent?

a)

Rolling

b)

Fluid

c)

Sliding

d)

Static

21.

Which type of friction does this picture represent?

a)

Rolling

b)

Fluid

c)

Sliding

d)

Static

22.

Which type of friction does this picture represent?

a)

Rolling

b)

Fluid

c)

Sliding

d)

Static

23.

What is the IDEAL mechanical advantage of this pulley?

a)

1

b)

3

c)

4

d)

2

24.

What is the IDEAL mechanical advantage of this pulley?

a)

1

b)

3

c)

4

d)

2

25.

What is the IDEAL mechanical advantage of this pulley?

a)

1

b)

3

c)

4

d)

2

26.

Which types of simple machines are part of scissors?

a)

Lever

b)

Wedge

c)

Screw

d)

Inclined Plane

e)

Wheel and Axle

27.

Which types of simple machines are part of a shovel?

a)

Lever

b)

Wedge

c)

Screw

d)

Inclined Plane

e)

Wheel and Axle

28.

Which types of simple machines are part of a wheelbarrow?

a)

Lever

b)

Wedge

c)

Pulley

d)

Inclined Plane

e)

Wheel and Axle

29.

Which types of simple machines are part of a moving truck?

a)

Lever

b)

Wedge

c)

Pulley

d)

Inclined Plane

e)

Wheel and Axle

30.

What are the units for work?

a)

J

b)

N

c)

m

d)

None

31.

The rate at which work is done is called___.

a)

mechanical advantage

b)

mechanical efficiency

c)

power

d)

work

32.

When an object moves in the same direction as the force applied to it is called___.

a)

mechanical advantage

b)

mechanical efficiency

c)

power

d)

work

33.

You make a calculation and the result is 200 w.


What did you calculate?

a)

Work

b)

Power

c)

Force

d)

Distance

34.

You make a calculation and the result is 1,000 J.


What did you calculate?

a)

Work

b)

Power

c)

Force

d)

Distance

35.

Does this count as SCIENTIFIC work?


"David picks up his book bag to leave for school."

a)

Yes

b)

No

36.

Does this count as SCIENTIFIC work?


"Anita listens to the teacher give instructions."

a)

Yes

b)

No

37.

Does this count as SCIENTIFIC work?


"The textbook sits on the edge of the table."

a)

Yes

b)

No

38.

Does this count as SCIENTIFIC work?


"The FedEx delivery person places a package on the doorstep."

a)

Yes

b)

No

39.

This unit is equal to 1 Newton-meter.

a)

1 Joule

b)

1 watt

c)

1 volt

d)

1 amp

40.

This unit is equal to 1 Joule/second.

a)

1 Newton

b)

1 watt

c)

1 volt

d)

1 meter

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