NMMS CLASS 8 PHYSICS Force and Pressure 2

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Force and Pressure 1

Force and Pressure 2

Force and Pressure 3

Force and Pressure 4

Force and Pressure 5


NMMS CLASS 8 PHYSICS Force and Pressure👇


1. A push or a pull on an object is called a —

  • Force
  • Pressure
  • Mass
  • Energy

2. When we stop pedalling a bicycle, it gradually slows down due to —

  • Magnetic force
  • Frictional force
  • Muscular force
  • Electrostatic force

3. Force can change the —

  • Only shape of an object
  • Only direction of motion
  • Shape, direction and speed of an object
  • Only size of an object

4. The unit of force is —

  • Pascal
  • Joule
  • Watt
  • Newton

5. A force that always opposes motion is —

  • Magnetic force
  • Gravitational force
  • Friction
  • Muscular force

6. Pressure is equal to —

  • Force × Area
  • Area ÷ Force
  • Mass × Acceleration
  • Force ÷ Area

7. The unit of pressure is —

  • Newton
  • Joule
  • Watt
  • Pascal

8. The pressure exerted by liquids —

  • Decreases with depth
  • Increases with depth
  • Same at all depths
  • Zero

9. Which of the following is a contact force?

  • Magnetic force
  • Electrostatic force
  • Frictional force
  • Gravitational force

10. The shape of a rubber ball changes when pressed. This shows that —

  • Force cannot change shape
  • Force produces heat
  • Force changes mass
  • Force can change shape of an object

11. A man lifts a box of 20 N. The force applied by him is —

  • 10 N
  • 50 N
  • 0 N
  • 20 N (upward)

12. The force with which Earth attracts objects is —

  • Magnetic force
  • Frictional force
  • Electrostatic force
  • Gravitational force

13. Which of the following increases pressure?

  • Increasing both area and force
  • Increasing the area of contact
  • Decreasing the area of contact
  • Decreasing force

14. A pointed knife cuts better than a blunt one because —

  • Pressure decreases
  • Force is less
  • Force is zero
  • Pressure increases due to small area

15. A camel walks easily on sand because —

  • Its feet exert more pressure
  • It does not touch the sand
  • Its broad feet reduce pressure on sand
  • It is very light

16. Pressure in fluids acts —

  • Only downward
  • In all directions
  • Only upward
  • Only sideways

17. When air is removed from a bottle, it becomes —

  • Unchanged
  • More rigid
  • Heavier
  • Lighter

18. The force exerted by air around us is called —

  • Magnetic pressure
  • Atmospheric pressure
  • Gravitational force
  • Hydraulic pressure

19. The normal atmospheric pressure at sea level is about —

  • 760 cm of mercury
  • 100 cm of mercury
  • 76 cm of mercury
  • 7.6 cm of mercury

20. The direction of pressure in liquids is —

  • Parallel to the surface
  • Upward only
  • Perpendicular to the surface
  • Downward only

21. A man applies 100 N force on a wall, but the wall does not move. Work done is —

  • 100 J
  • Zero
  • 50 J
  • 10 J

22. The instrument used to measure pressure is —

  • Thermometer
  • Voltmeter
  • Ammeter
  • Barometer

23. The SI unit of pressure is —

  • Joule
  • Bar
  • Pascal (Pa)
  • Newton

24. The shape of a balloon changes when air is blown into it. This shows that —

  • Air expands only sideways
  • Air has no mass
  • Air exerts pressure
  • Air has no weight

25. Force acting per unit area is called —

  • Work
  • Power
  • Pressure
  • Energy

26. Liquids exert pressure on —

  • Only top surface
  • Only bottom surface
  • Only walls of container
  • Walls and bottom of the container

27. A moving car stops when brakes are applied because of —

  • Frictional force
  • Gravitational force
  • Muscular force
  • Magnetic force

28. When you stretch a rubber band, you apply —

  • Gravitational force
  • Muscular force
  • Magnetic force
  • Frictional force

29. The pressure inside a deep-sea diver’s suit must balance —

  • Atmospheric pressure
  • Magnetic pressure
  • Water pressure at that depth
  • Gravitational force

30. When two forces act in opposite directions on an object, the net force is —

  • Equal to one of them
  • The difference between the two forces
  • The sum of the two forces
  • Always zero
Location: Mogalturu, Andhra Pradesh 534281, India

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