9th Class Physics Chapter 4 Online MCQ Test With Answers PDF English Medium (Turning Effect of Forces)

Physics 9th Class English Medium Unit 4 Online Test

Sr. #	Questions	Answers Choice
1	If a body is at rest or moving with uniform rotational velocity, then torqu acting on the boyd will be.	Zero Maximum Minimum Infinite
2	When line of action of the applied force passes through its pivot point then momet of force acting on the body is	Maximum Minimum Infinite Zero
3	A seesaw balances perfectly with two children of equal weight sitting at equal distances fromt he fulcerum. If one child moves closer to the fulcrum.	The seesaw topples The seesaw tips towrds the child who stayed further away The seesaw tips towards the child who moved closer The seesaw remains balanced
4	Centripetal force is given by	rF mv2/r mv /r2 r Fcos0
5	A cylinder resting on its circulr bases is in	Neurtral equilibrium Stable equilibrium Unsatable equilibrium None of these three
6	The centre of mass of a body	Lies always inside the body May lie within, outside or on the surface Lies always on the surfce of the body Lies always on the sufrace of the body.
7	In stable equilibriu the centre of gravity of the body lies.	At the highest position At any position Outside the body At the lowest position
8	A man walks on a tight rope. He balances hiself by holding a bamboo stick horizontally, It is an application of	Law of conseration of momentum Principle of momentums Newton's third law of motion News' second law of motion
9	A shopkeeper sells his articles by a balance having unequal arms of the paes. If he puts the weights in the pan having shorter arm, then the customer.	Gains Loses Neigher loses nor gains Not certain
10	Moment of force is called	Couple Moment arm Torque Couple arm
11	A force F is making an angle of 60 ^owith x-axis . Its y-component is equal to.	F F cos 60<sup>o</sup> F Sin 60 <sup>o</sup> F tan 60 <sup>o</sup>
12	A particle is simulataneously acted upon by two forces of a 4 and 3 newtons. The net force on the particle is.	Between 1 N and 7 N 1 N 5 N 7 N

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