Question # 1

The unit of π is:

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N

m

s

None

If the mass of moving body in a circle is doubled then centripetal force wil be:

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Doubled

Half

4 times

Same

All divers need to wear seat belt because of effect of:

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Air resistance

Tensional

Push force

Gravitational

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

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5 N

25 N

20 N

30 N

________ is used to measure the force or weight of a body :

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Physical balance

Spring balance

A and B both

None

Rate of change of momentum equals:

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Displacement

Acceleration

^Force

Velocity

A ball of mass 1 kg moving with velocity 2 ms-1, Its momentum will be

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1 Ns

2 Ns

0.5 Ns

4 Ns

If no external force acting on a body then such system is called.

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Ideal system

Controlled system

Isolated system

None

If radius of circle is doubled then centripetal acceleration becomes:

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Doubled

Three times

Four times

Half times

All forces are example of contract forces except:

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Air resistance

Tensional

Push force

Gravitational

When horse pulls a cart, the action is on the:

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Cart

Earth

Horse

Earth and cart

Two bodies of masses m₁ and m₁ attached to the ends of an inextensible string passing over a frictionless pulley such that both move vertically. The acceleration of the bodies is:

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m1 x m₂ / m₁ + m₂ g

m₁ - m₂ / m₁ + m₂ g

m₁ + m₂ / m₁ - m₃ g

None of these

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

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9th Class Physics Chapter 3 Dynamics English Medium KPK Boards Online Mcqs MCQs With Answers

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