CBSE Science Class 8

Force And Pressure

Force And Pressure - Chapter Wise CBSE Solved Question and Answer Based On NCERT

Very Short Q&A:

Q1: Push or pull on an object is known as ______________.
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Q2: Force has both magnitude and ______________.
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Q3: The strength of force is usually expressed by its _____________.
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Q4: What can bring change in state of motion of an object?
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Q5: Define pressure.
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Q6: What are contact forces?
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Q7: What are non-contact forces?
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Q8: What happens when the forces are applied on an object in the same direction?
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Q9: Force can bring change in _____________ and _____________ of an object.
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Q10: Give an example of contact force.
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Q11: Give two examples of non-contact forces.
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Q12: A batsman hits a cricket ball which then rolls on the level ground. After covering a short distance the ball comes to rest. The ball stops due to____________.
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Q13: When two forces, applied on an object, are equal and opposite, then these forces
  1. May move the object.
  2. May stop a moving object.
  3. May move the object and also cause a change in its shape.
  4. Do not move the object but may cause a change in its shape.
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Q14: Which of the following is an example of contact force?
  1. Magnetic force
  2. Muscular force
  3. Electric force
  4. Gravitational force
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Q15: A fruit falling from tree is an example of which type of force?
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Q16: What is the unit of pressure?
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Q17: Which force act from distance and pull iron objects?
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Q18: What is SI unit of Force?
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Q19: What is muscular force?
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Q20: What is the relation between direction of force of friction and direction of motion?
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Q21: Define electrostatic force.
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Q22: Electrostatic force is an example of ______________.
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Q23: Water begins to flow towards the ground as soon as we open a tap. This happens due to which force?
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Q24: Southpole of a magnet repels south pole of another magnet. True/false.
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Q25: Define friction.
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Q26: Why the cutting edge of a knife should be as sharp as possible?
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Q27: Cars and buses are able to run on roads. Which force is responsible for it?
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Q28: If the area over which the force acts decreases, the pressure __________.
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Q29: Which force is used to separate solid pollutant particles from smoke given out from factories?
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Q30: What is the force exerted by the Earth on all the bodies on its surface known as?
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Q31: Name the instrument which is used to measure liquid pressure.
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Q32: A liquid exerts pressure in __________ direction. ( upward/downward/sideways/all)
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Q33: Which type of force a person applies while pulling an object?
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Q34: Why muscular force is a type of contact force?
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Q35: If the area over which the force acts decreases, the pressure increases. (true/false)
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Chapter 11 Force And Pressure