9th Class Physics English Medium Online Test For Full Book With Answers

9th Class Physics English Medium Online Test For Full Book

Sr. # Questions Answers Choice
1 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
2 Centripetal force is given by rF mv2/r mv /r2 r Fcos0
3 A cylinder resting on its circulr bases is in Neurtral equilibrium Stable equilibrium Unsatable equilibrium None of these three
4 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.
5 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
6 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
7 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
8 Moment of force is called Couple Moment arm Torque Couple arm
9 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>
10 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
11 A bucket having some water is revolved in vertical circle. Water does not spill out, even the bucket is upside down, due to. Centrifugal force on water Weight of water Inertial of water Action and Reaction balance each other
12 At the fairground, the force that balances your weight is Gravitatinal force Electrostatic force Centripetal force Frictional force
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