The instrument used to measure pressure of liquids is:
  • barometer
  • manometer
  • pressure meter
  • none of these
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
Pushing a rock from a hill top is an example of:
  • muscular force
  • magnetic force
  • frictional force
  • electrostatic force
Under which condition can a moving object charge its direction:
  • by reducing friction
  • by increasing friction
  • by applying force
  • by not applying force
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
The SI unit of force is:
  • kilogram
  • gram
  • newton
  • none of these
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.
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
Force is a
  • Push
  • Push or Pull
  • Pull
  • Neither push nor pull
The pressure at the bottom of the tank containing a liquid does not depend on
  • Area of the bottom surface
  • Nature of the liquid
  • Height of the liquid column
  • Acceleration due to gravity
Which one of the following is a non-contact force
  • Magnetic force
  • Spring Force
  • Force of Friction
  • Muscular Force
A brick is kept in three different ways on a table as belowThe pressure exerted by the brick on the table will be
class8-science-chapter-11-mcq-3.png
  • maximum in position A
  • maximum in position B
  • equal in all cases.
  • maximum in position C
Three forces act on the body as given below
class8-science-chapter-11-mcq-1.png
  • Body will move towards right
  • Body will not move
  • Body will move towards left
  • Body may move either left or right
The S.I unit of Force is
  • Pascal
  • Kg-wt
  • Newton/m2>/sup>
  • Newton
Equal volume of liquid are the poured the three vessel having same base area as shown below. Let P1 ,P2 and  P3 be the pressure at the base respectively, then
class8-science-chapter-11-mcq-4.png
  • P1 > P2 > P3
  • P3 > P1 > P2
  • P1 = P2 = P3
  • P2 > P1 > P3
Three forces act on the body as given below
class8-science-chapter-11-mcq-2.png
  • The body will move towards left with force 5 N acting on it
  • Body will not move
  • The body will move towards left with force 35 N acting on it
  • The body will move towards right with force 5 N acting on it
A body weighs 100 N is placed on the top of the wooden table. The area of contact is 2 mThe pressure exerted by the body on the wooden table will be
  • 100 Pa
  • 25 Pa
  • 75 Pa
  • 50 Pa
Force acts on an object may change
  • speed
  • direction
  • all of above
  • shape
During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is
  • electrostatic force.
  • magnetic force
  • force of gravity.
  • force of friction.
We have two surfaces A and B where same amount of Force is acting. Area of Surface A  is greater than Area of Surface B. which of the following will be true
  • Pressure on Surface A > Pressure on Surface B
  • Pressure on Surface B > Pressure on Surface A
  • Pressure does not depend on area
  • Pressure on Surface A= Pressure on Surface B
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