StudentAidUnit 4: Turning Effects of Force — Mcqs
9th Class Physics · Unit 4: Turning Effects of Force
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Multiple Choice Questions (Exercise)
1.A particle is simultaneously acted upon by two forces of 4 and 3 newtons. The net force on the particle is:
2.A force F is making an angle of 60° with x-axis. Its y-component is equal to:
3.Moment of force is called:
4.If F1 and F2 are the force acting on a body and T is the torque produced in it, the body will be completely in equilibrium, when:
5.A shopkeeper sells his articles by a balance having unequal arms of the pans. If he puts the weights in the pan having shorter arm, then the customer:
6.A man walks on a tight rope. He balances himself by holding a bamboo stick horizontally. It is an application of:
7.In stable equilibrium the centre of gravity of the body lies:
8.The centre of mass of a body:
9.A cylinder resting on its circular base is in:
- a stable equilibrium
- b unstable equilibrium
- c neutral equilibrium
- d none of these three
10.Centripetal force is given by:
SLO based Additional MCQs
1.A seesaw balances perfectly with two children of equal weight sitting at equal distances from the fulcrum. If one child moves closer to the fulcrum:
- a The seesaw remains balanced.
- b The seesaw tips towards the child who moved closer.
- c The seesaw tips towards the child who stayed further away.
- d The seesaw topples.
2.When line of action of the applied force passes through its pivot point then momnet of force acting on the body is:
3.If a body is at rest or moving with uniform rotational velocity, then torque acting on the body will be:
4.You are trying to loosen a nut using a spanner, but it is not working. In order to open the nut, you need to:
5.A body in equilibrium must not have:
6.A uniformly rotating fan is said to be in:
7.A tightrope walker is carrying a long pole while walking across a rope. The stability of the walker is affected if the pole is:
- a long and placed vertically
- b long and placed horizontally
- c short and placed vertically
- d short and placed horizontally
8.You throw a weighted fishing net into a calm lake. As the net sinks, it opens fully underwater, spreading out its mesh evenly. Compared to the moment it left your hand, where is the net's center of mass now?
- a Higher is the water column.
- b Lower in the water column.
- c At the same depth but slightly shifted horizontally.
- d Unchanged from its position when thrown.
9.It is more difficult to walk on a slippery surface than on a nonslippery one because of:
10.For an object moving with terminal velocity, its acceleration:
11.The correct order of comparison for the terminal speeds of a raindrop, snowflake, and hailstone is:
- a Raindrop> Snowflake > Hailstone
- b Hailstone > Raindrop > Snowflake
- c Snowflake > Raindrop > Hailstone
- d Raindrop = Snowflake = Hailstone
12.The force that always changes direction of velocity and not its magnitude is called:
13.The reason that a car moving on a horizontal road gets thrown out of the road while taking a turn is:
14.A car drives at steady speed around a perfectly circular track:
15.A satellite of mass 'm' is revolving around the earth with an orbital speed 'v'. If mass of the satellite is doubled, its orbital speed will become: