Question # 1

A ball with initial momentum p its a solid wall and bounces back with the same velocity. Its momentum p after collision will be.

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P' = p

P' = - P

P' = 2P

P' =-2P

An object will continue its motion with constant acceleration until

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The resultant force is at right angle

The resultant fore on it begins to increase

The resultant force on it begins to decrease

The resultant force is at right angle to its tanggential velocity

At the fairground, the force that balances your weight is

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Gravitatinal force

Electrostatic force

Centripetal force

Frictional force

Which of the following is a non -contact force.

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Friction

Electrostatic force

Air resistance

Tension in the string

What we kick a stone, we get hurt This is due to

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Inertia

Momentum

Reaction

Velocity

Thrust force is a consequence of which law of motion.

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First

Second

Third

Fourth

A lubricant is usually introduced between two surfaces to decresses friction. The lubricant.

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Decreases temperture

Provides rolling friction

Prevents direct contact of the sturaces

Acts as ball bearings

A bucket having some water is revolved in vertical circle. Water does not spill out, even the bucket is upside down, due to.

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Centrifugal force on water

Weight of water

Inertial of water

Action and Reaction balance each other

An object with a mass 5 kg moves at constatn velocity of 10 ms-1 A constant force then acts for 5 seconds on the object and gives it a velocity of 2 ms-1. In the opposite direction ,The force acting on the objects is.

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-12 N

5 N

-10 N

-15 N

Net force n the body falling in air with uniform velicyt is equl to.

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Zero

Weight of the body

Are resistance on the body

Difference of weight of body and air resistance on it.

Conservation of Linear momentum is equivalent to.

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Newton's Firs law of motion

Newton's second law of motion

Newton's third law of motion

None of these

N kg-1 is equivalent to

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m s-1

m s-2

k g ms-1

kg m s-2

A force acts on a boyd for 2 seconds and it produces 50 kg m/s chagne in its momentum. The force acting on the body

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25 N

100 N

2 N

50 N

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Physics 9th Class English Medium Unit 3 Online Test MCQs With Answers

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