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force

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

what kind of force is Friction

(a)  

2.

write two states of motion .

4 lines
3.

which force is non contact force

a)

gravitational

b)

magnetic

c)

electrostatic

d)

all of the above

4.

A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be

a)

maximum in position A

b)

maximum in position B

c)

maximum in position C

d)

equal in all cases.

5.

During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is___________

a)

force of gravity

b)

electrostatic force.

c)

force of friction.

d)

magnetic force

6.

In Fig two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

a)

Magnitude of force applied by A is greater than that of B

b)

Magnitude of force applied by A is smaller than that of B.

c)

Net force on the block is towards A.

d)

Magnitude of force applied by A is equal to that of B.

7.

name the instrument used to measure atmospheric pressure ?

(a)  

8.
What does pressure measure?
a)
Strength
b)
Force exerted on a given area of surface
9.
Where is pressure the greatest on the dam?
a)
D
b)
C
c)
B
d)
A
10.
Which of these animals would probably cause the greatest pressure on the ground?
a)
A fat cow with big feet
b)
A fat cow with small feet
c)
 A calf with big feet
d)
A calf with small feet
11.
Army tank tracks are useful for travelling through the mud because..
a)
they decrease the force the vehicle exerts on the ground
b)
they increase the force the vehicle exerts on the ground
c)
they decrease the pressure the vehicle exerts on the ground
d)
they increase the pressure the vehicle exerts on the ground
12.
If the horse reared up on 2 legs what effect would it have on the pressure?
a)
it will exert half the pressure it did before
b)
it will exert the same pressure it did before
c)
it will exert twice the pressure it did before
d)
it will exert four times the pressure it did before
13.
What pressure does a 4000N horse exert on the ground if each foot is 10cm2?
a)
40 N/cm2
b)
100 N/cm2
c)
400 N/cm2
d)
10 N/cm2
14.
What is the instrument that measures air pressure called?
a)
Graduated cylinder
b)
Barometer
c)
Force scale
d)
Anemometer
15.
Look at the pressure triangle. How do we calculate the area?
a)
f ÷ a
b)
f x p
c)
p x f
d)
f ÷ p
16.
Atmospheric pressure increases as you move towards lower elevations and decreases as you move into higher elevations.
a)
True
b)
False
17.
Pressure decreases when the surface area over which a force is applied increases
a)
True
b)
False
18.
What is the unit of measurement for pressure?
a)
pascal
b)
grams
c)
milliters
d)
meters
19.
What is the equation used to calculate pressure?
a)
pressure= force/mass
b)
pressure =mass/volume
c)
pressure=area/force
d)
pressure=force/area
20.
Fluids can also include__ and__. 
a)
solids and liquids
b)
solids and gases
c)
liquids and gases
d)
liquids