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Monday, September 20, 2021

Class 8 | Science | Force and Pressure | Worksheet - 2

1. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to?

pressure of water
gravity of the earth
shape of rubber bulb
atmospheric pressure
2. Does the force of gravitation exist between two astronauts in space?
Yes
No
Never
Sometimes
3. The pressure which is exerted by air around us is known as?
force
atmospheric pressure
muscular force
friction
4. Force acting on per unit area is called
contact force
non-contact force
pressure
density
5. ___________ exerted by an object on another is a force.
Density
Push or pull
Magnitude
Contact or Non-contact force
6. The force exerted by the earth to pull the object towards itself is called
force of gravity
electrostatic force
force of friction
magnetic force
7. Muscular force is also called ___________ force.
non-contact
contact
gravitational
electrostatic
8. Which of the following is/are changed by Force?
Motion of body
Speed of body
Shape of body
All of the above
9. When two forces act in opposite directions, then net force acting is the
sum of two forces
difference between two forces
both the above
None of the above
10. A ball rolling on the ground slows down and finally stops. This is because of?
Force
Less force applied
Friction
None of the above






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