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TEST Work & Simple Machines

Total questions: 40

Worksheet time: 23mins

Name
Class
Date
1.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)

a mother pushes a stroller up a ramp into a building

d)
a girl eats a sandwich
2.

We use simple machines to help increase the amount of ____ used, but NOT the amount of _____.

a)

work, force

b)

force, work

c)

force, energy

d)

energy, work

3.
Simple machines make work easier by 
a)
increasing the energy needed to do the work, while reducing friction.
b)
changing the size or direction of the force, or both
c)
reducing work
d)
simple machines do all of these
4.
What is the fixed point upon which a lever rotates?
a)
fulton
b)
fulcrum
c)
furmen
d)
falcon
5.
Which  simple machine is found on the head of an ax?
a)
wedge
b)
lever
c)
pulley
d)
screw
6.

What tool and unit is used to measure effort force like what is exerted on this pulley?

a)

spring scale; mililiters (mL)

b)

spring scale; Newtons (N)

c)

electronic balance;

grams (g)

d)

electronic balance;

Joules (J)

e)

ruler; centimeters (cm)

7.

No machine can be 100% efficient because of

a)

Thermal energy

b)

Waste energy

c)

Convection energy

d)

Friction

8.
How does a single fixed pulley make work easier?
a)

It changes the direction of the force.  

b)

It increases the size of the force.

c)

It increases the speed of the force

d)

It changes the friction across the load

9.
Which pulley makes work easiest?
a)
1
b)
2
c)
3
d)
they are all the same
10.

How can we decrease the effort needed to make it easier to move a box up a ramp?

a)

Make the ramp shorter

b)

Add rubber to the bottom of the box.

c)

Make the ramp longer

d)

Pull it up instead of pushing it up.

11.

Which of the following has a wheel and axle?

a)

bicycle

b)

wheel barrow

c)

pulley

d)

all of the above

12.
Simple machines have helped us in everyday life. What kind of simple machine is a knife?
a)
wheel and axle
b)
wedge
c)
screw
d)
pulley
13.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
screw
d)
wheel and axle
14.

What are the parts of the lever?

a)

A: Resistance

B: Effort

C: Fulcrum

b)

A: Effort

B:, Fulcrum

C: Resistance

c)

A: Resistance

B: Fulcrum

C: Effort

d)

A: Fulcrum

B: Effort

C: Resistance

15.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
16.

Which of these are examples of wheels and axles? Tick all the correct answers

a)

Doorknob

b)

Ramp

c)

Well

d)

Steering wheel

17.

What is the point of using a wheel and axle?

a)

It does more work for more force

b)

It is shiny and decorative

c)

It does the same work, but takes less force

d)

It can be used on any terrain

18.

What is the mechanical advantage M.A. if the radius of the wheel is 27 cm and the radius of the axle is 18 cm?

M.A.wheel and axle= radius of wheelradius of axleM.A._{wheel\ and\ axle}=\ \frac{radius\ of\ wheel}{radius\ of\ axle}

a)

0.67

b)

1.5

c)

4

d)

9

19.
An inclined plane reduces the amount of force needed to move an object by - 
a)
increasing the distance the object moves.
b)
transferring more of the force to the object
c)
reversing the direction the object is moved.
20.
Which of the following decreases when an object is moved using an inclined plane?
a)
The distance the object moves.
b)
The pull of gravity on the object.
c)
The force needed to move the object.
d)
The amount of space the object occupies.
21.

How much force would be needed to lift the 150 N weight?

  (M.A. = Count # ropes supporting weight)

a)
300 N
b)
150 N
c)
75 N
d)
25 N
22.

An inclined plane is 12 meters long and raises 3 meter high.  If you want to push a 100 N box up the inclined plane, how much effort force will you need?

M.A.inclined plane=lengthheightM.A._{inclined\ plane}=\frac{length}{height}  

a)

2 N

b)

20 N

c)

25 N

d)

 50 N

23.

Penny wants to lift the 100 lb load using a moveable pulley.  How much effort force does she need to use?

a)

100 lbs

b)

200 lbs

c)

50 lbs

d)

25 lbs

24.

Simple machines like pulleys and inclined planes definitely make work easier. You get away using LESS FORCE, but what is the "trade off?"

a)

Move over smaller distance

b)

Move with less speed

c)

Move over larger distance

d)

Move with greater speed

25.
3. Which type of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
26.
For a lever to be a first class lever the fulcrum needs to be ..
a)

between the resistance and the effort

b)

on the end closest to the resistance arm. 

c)

on one end closest to the effort arm

27.
This baseball pitcher is demonstrating which type of lever at the shoulder?
a)
1st class
b)
2nd class
c)
3rd class
d)
4th class
28.
A wheelbarrow is an example of a:
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
29.

What class lever is this?

a)

1st

b)

2nd

c)

3rd

30.

If the distance from pivot to the girl's hands is 50 inches but the distance from the pivot to the load of rocks is only 10 inches, what is the mechanical advantage?

a)

0.2

b)

5

c)

10

d)

500

31.

Two or more simple machines that work together

a)

work

b)

compound machine

c)

gear

32.
A log splitting machine was invented to split logs quickly. A motor powers a metal piece that is pushed through the middle of a log. The metal piece used to split a log is an example of what simple machine? 
a)
wedge
b)
pulley
c)
screw
d)
lever
33.

What class of lever is the tweezers?

a)

first class

b)

second class

c)

third class

34.

A spiral staircase is which simple machine?

a)

inclined plane

b)

screw

c)

wheel and axle

d)

pulley

e)

lever

35.

A bicycle is considered a "compound machine." Which simple machine(s) are on a bicycle?

(Select ALL that apply)

a)

wheel and axle

b)

pulley

c)

screw

d)

lever

36.

What is the ideal mechanical advantage of the following pulley?

a)

1

b)

2

c)

4

d)

7

37.

What is the ideal mechanical advantage of the following pulley?

a)

1

b)

2

c)

5

d)

6

38.

What is the ideal mechanical advantage of the following pulley?

a)

1

b)

2

c)

4

d)

6

39.

What is the ideal mechanical advantage of the following pulley?

a)

1

b)

2

c)

4

d)

6

40.

If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley?

a)
2N
b)
5N
c)
10N
d)
15N

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