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Levers

Total questions: 32

Worksheet time: 16mins

Name
Class
Date
1.
The most common simple machines are….
a)
a. levers
b)
b. bicycles
c)
c. car machines
d)
d. sewing machines
2.
The lever rotates around a fixed point called
a)
a. resistance force
b)
b. fulcrum
c)
c. effort force
d)
d. a rigid bar
3.
Levers were first described by the greek scientest……
a)
a. Archimedes
b)
b. El-Hassan Ibn El-Haitham
c)
c. Newton
d)
d. Mendel
4.
……….is a rigid bar that rptates around fulcrum , and is affeted by an effort force and resistance force
a)
a. Lever
b)
b. Solution
c)
c. Mixture
d)
d. Friction force
5.
The ….force is exerted by a person to equilibrate the resistance
a)
a. effort
b)
b. fulcrum
c)
c. friction
d)
d. resistance
6.
Any lever consists of ……
a)
a. resitance force ( R)
b)
b. an effort force (F)
c)
c. a fulcrum (O)
d)
d. (a) , (b) and (c )
7.
All the following are from the importance of levers except…….
a)
a. increasing speed
b)
b. increasing force
c)
c. increasing size
d)
d. accurcy in performance
8.
…is a lever that uses a small force to make a great effort
a)
a. Crowbar
b)
b. Hockey bat
c)
c. Ice holder
d)
d. Seesaw
9.
Tweezeres are used to…..
a)
a. move heavy load
b)
b. increase the speed of the ball
c)
c. pick up very small objects
d)
d. hold the cold materials
10.
Which of the following levers is used to avoid dangers?
a)
a. Coal holder
b)
b. Scissors
c)
c. Seesaw
d)
d. Manual broom
11.
….increases the speed of objects that we affect them
a)
a. Manual broom
b)
b. Seesaw
c)
c. Hockey bat
d)
d. Coal holder
12.
The lever rotates around a fixed point called
a)
a. resistance force
b)
b. fulcrum
c)
c. effort force
d)
d. rigid bar
13.
Which of the levers derived is used to enlarge the distance?
a)
a. Coal holder
b)
b. Scissors
c)
c. Crowbar
d)
d. Manual broom
14.
The …………… force exerted by a person to equilibrate the resistance
a)
a. fulcrum
b)
b. effort
c)
c. friction
d)
d. a and b
15.
Which of the following is 2nd class lever?
a)
Tweezers
b)
paddle
c)
wheel barrow
d)
pliers
16.
Which of the following is 1st class lever?
a)
Nutcracker
b)
manual broom
c)
seesaw
d)
ice holder
17.
Which of the following is 3rd class lever ?
a)
Hammer claw
b)
bottle opener
c)
crowbar
d)
fishing tool
18.
The Law of lever states that …………
a)
a. force x its arm= resistance x its arm
b)
b. force/its arm= resistance/its arm
c)
c. force+its arm= resistance+its arm
d)
d. force x its arm= resistance+its arm
19.
When the arm of force equals 4 cm and the arm of resistance equals 4 cm ; so
a)
a. The effort force = the resistance force
b)
b. The effort force > the resistance force
c)
c. The resistance force < the effort force
d)
d. The effort force < the resistance force
20.
All the third class levers and some of first class levers are beneficial in all the following except
a)
a. Increasing the distance
b)
b. Increasing speed
c)
c. Saving effort
d)
d. Avoid danger
21.
Which of the following levers doesn’t save effort ?
a)
a.coal holder
b)
b.Nutcracker
c)
c. Wheelbarrow
d)
d.Bottle opener
22.
When the arm of force equals 4 cm ,effort force = 30 Newton and the arm of resistance equals6 cm ; so the resistance force will be
a)
20Newton
b)
20 meters
c)
10Newton
d)
5 Newton
23.
The effort force and the resistance force are measured in
a)
a.Newton
b)
b. Metre
c)
c.Centimetre
d)
d. Hertz
24.
6. What kind of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
25.

This baseball BAT is demonstrating which type of lever at the shoulder?

a)

1st class

b)

2nd class

c)

3rd class

d)

4th class

26.
A wheelbarrow is an example of a:
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
27.

What type of lever

a)

First Class Lever

b)

Second Class Lever

c)

Third Class Lever

28.

This object is a lever class number ...

a)

1

b)

2

c)

3

d)

No. It is not a lever.

29.

Lever affected by 500 Newton force and arm length is 20 meter and

also affected by 1000 Newton resistance, and its arm length is 5 m , is

the lever at equilibrium?

a)

yes

b)

no

30.

The length of the force arm of a first class lever is 5 cm. and the

length of resistance arm is 15 cm. if the resistance has a value of 300

Newton, calculate the value of effort force.

a)

100 N

b)

300 Cm

c)

600 cm

d)

900 N

31.

Second class lever, force = 200 Newton. Force arm = 5 cm,

calculate the resistance arm, When the resistance = 100 N.

a)

10 cm

b)

10 N

c)

4000 cm

d)

400 N

32.

The only type of levers, where the arm of force and the arm of resistance are

equal is the.....................

a)

1st class levers

b)

2nd class levers

c)

3rd class levers

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