CBSE  /  Class 8  /  Science  /  Force and Pressure

  • 1. 
    By decreasing the contact area the pressure:

  • is decreased
  • remain same
  • is increased
  • none of these

  • 2. 
    The unit of pressure is:

  • Newton
  • Newton/metres
  • Newton metres
  • Newton/metre

  • 3. 
    The instrument used to measure pressure of liquids is:

  • barometer
  • manometer
  • pressure meter
  • none of these

  • 4. 
    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

  • 5. 
    Pushing a rock from a hill top is an example of:

  • muscular force
  • magnetic force
  • frictional force
  • electrostatic force

  • 6. 
    Under which condition can a moving object charge its direction:

  • by reducing friction
  • by increasing friction
  • by applying force
  • by not applying force

  • 7. 
    A stone thrown with a catapult (Gulal) falls back on the ground because :

  • the muscles apply force
  • the stone applies force
  • the earth exerts force
  • the catapult exerts force

  • 8. 
    The SI unit of force is:

  • kilogram
  • gram
  • newton
  • none of these

  • 9. 
    A man walking on the street slips on a banana skin because:

  • it is sticky
  • his foot crushes it
  • at that point there is very little friction
  • all of these.

  • 10. 
    between his shoe and the ground In desert areas, a camel can walk very easily as compared to horse because it has:

  • lesser weight
  • broader feet
  • smaller feet
  • heavier body
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