Extra 40 MCQs with answers from the chapter:8 "Force and Pressure" for Class 8 Science CBSE:-
1. A force that can change the state of motion of an object is called:
a) Energy
b) Pressure
c) Force
d) Work
Ans: (c) Force
2. The SI unit of force is:
a) Newton
b) Pascal
c) Joule
d) Watt
Ans: (a) Newton
3. A force applied by touching an object is called:
a) Contact force
b) Non-contact force
c) Magnetic force
d) Gravitational force
Ans: (a) Contact force
4. Which of the following is NOT a contact force?
a) Frictional force
b) Muscular force
c) Magnetic force
d) Normal force
Ans: (c) Magnetic force
5. The force that always opposes the motion of an object is called:
a) Gravitational force
b) Frictional force
c) Magnetic force
d) Electrostatic force
Ans: (b) Frictional force
6. The force exerted by our muscles is called:
a) Frictional force
b) Muscular force
c) Magnetic force
d) Electrostatic force
Ans: (b) Muscular force
7. The force exerted by a charged body on another body is called:
a) Magnetic force
b) Electrostatic force
c) Frictional force
d) Gravitational force
Ans: (b) Electrostatic force
8. The force exerted by a magnet on an iron nail is an example of:
a) Contact force
b) Muscular force
c) Magnetic force
d) Frictional force
Ans: (c) Magnetic force
9. The force that pulls objects toward the centre of the Earth is called:
a) Gravitational force
b) Magnetic force
c) Electrostatic force
d) Frictional force
Ans: (a) Gravitational force
10. Which force acts on a falling object?
a) Muscular force
b) Frictional force
c) Magnetic force
d) Gravitational force
Ans: (d) Gravitational force
11. When the area of contact increases, pressure:
a) Increases
b) Decreases
c) Remains constant
d) None of these
Ans: (b) Decreases
12. The SI unit of pressure is:
a) Pascal
b) Newton
c) Joule
d) Watt
Ans: (a) Pascal
13. The pressure exerted by a liquid:
a) Decreases with depth
b) Increases with depth
c) Remains constant
d) Depends on the shape of the container
Ans: (b) Increases with depth
14. Atmospheric pressure is caused by:
a) Weight of air above us
b) Earth's rotation
c) Gravity of the moon
d) Sun's heat
Ans: (a) Weight of air above us
15. Why do knives have sharp edges?
a) To increase force
b) To decrease pressure
c) To increase pressure
d) To reduce weight
Ans: (c) To increase pressure
16. The force that helps us in walking is:
a) Muscular force
b) Gravitational force
c) Frictional force
d) Magnetic force
Ans: (c) Frictional force
17. Liquids exert pressure:
a) In one direction
b) Only downward
c) In all directions
d) Only upwards
Ans: (c) In all directions
18. Which force is used by a rocket to move forward?
a) Muscular force
b) Magnetic force
c) Frictional force
d) Action-reaction force
Ans: (d) Action-reaction force
19. Which of the following is NOT a non-contact force?
a) Magnetic force
b) Frictional force
c) Gravitational force
d) Electrostatic force
Ans: (b) Frictional force
20. Which of these is an example of a non-contact force?
a) Kicking a football
b) Lifting a book
c) Magnetic force
d) Writing with a pen
Ans: (c) Magnetic force
21. Which instrument is used to measure atmospheric pressure?
a) Thermometer
b) Barometer
c) Hydrometer
d) Speedometer
Ans: (b) Barometer
22. Why do camels have broad feet?
a) To increase pressure
b) To decrease pressure
c) To increase force
d) To reduce weight
Ans: (b) To decrease pressure
23. What happens when we apply force on an object?
a) Its motion may change
b) Its shape may change
c) Both a and b
d) Nothing happens
Ans: (c) Both a and b
24. Which of the following affects the pressure exerted by a solid?
a) Force applied
b) Area of contact
c) Both a and b
d) None of these
Ans: (c) Both a and b
25. The pressure exerted by air is called:
a) Frictional pressure
b) Atmospheric pressure
c) Gravitational pressure
d) Water pressure
Ans: (b) Atmospheric pressure
26. Which of the following is true about pressure in liquids?
a) It increases with depth
b) It decreases with depth
c) It remains the same
d) It depends on volume
Ans: (a) It increases with depth
27. Which of these exerts the most pressure?
a) A person wearing high heels
b) A camel's foot
c) A car tire
d) A tractor wheel
Ans: (a) A person wearing high heels
28. What happens to the atmospheric pressure as we move up a mountain?
a) Increases
b) Decreases
c) Remains the same
d) None of these
Ans: (b) Decreases
29. What is the force responsible for water rising in a syringe when the piston is pulled?
a) Magnetic force
b) Gravitational force
c) Atmospheric pressure
d) Muscular force
Ans: (c) Atmospheric pressure
30. What is the main reason for wearing helmets while riding bikes?
a) To reduce force
b) To reduce pressure
c) To increase friction
d) None of these
Ans: (b) To reduce pressure
31. Which force is responsible for the falling of leaves from a tree?
a) Magnetic force
b) Electrostatic force
c) Frictional force
d) Gravitational force
Ans: (d) Gravitational force
32. Which of the following forces is an example of a contact force?
a) Magnetic force
b) Electrostatic force
c) Frictional force
d) Gravitational force
Ans: (c) Frictional force
33. What happens to the force of gravity as we move away from Earth?
a) Increases
b) Decreases
c) Remains the same
d) Doubles
Ans: (b) Decreases
34. Which of the following increases pressure?
a) Increasing force and decreasing area
b) Decreasing force and increasing area
c) Increasing both force and area
d) Decreasing both force and area
Ans: (a) Increasing force and decreasing area
35. Which of these forces helps an airplane to fly?
a) Frictional force
b) Muscular force
c) Magnetic force
d) Lift force
Ans: (d) Lift force
36. The force exerted by liquids and gases on objects is called:
a) Magnetic force
b) Frictional force
c) Pressure
d) Gravitational force
Ans: (c) Pressure
37. Why does a sharp needle pierce the skin more easily than a blunt needle?
a) It has more weight
b) It has a larger surface area
c) It exerts more pressure due to its smaller area
d) It exerts less pressure
Ans: (c) It exerts more pressure due to its smaller area
38. Which of the following statements is true about friction?
a) Friction always slows down motion
b) Friction is never useful
c) Friction is a non-contact force
d) Friction only occurs in solids
Ans: (a) Friction always slows down motion
39. What is the reason behind the shape of streamlined vehicles?
a) To increase air resistance
b) To reduce friction and air resistance
c) To increase the weight of the vehicle
d) To increase gravitational force
Ans: (b) To reduce friction and air resistance
40. Which of the following does NOT affect the force of friction?
a) Surface roughness
b) Mass of the object
c) Surface area in contact
d) Temperature of the object
Ans: (d) Temperature of the object
