Question # 1

If Fx and Fy are rectangular components of vector F, then its direction is determined by the relation

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θ = sin-1 Fv/Fx

θ = tan-1 Fx/Fy

θ = tan Fx/Fy

θ = tan Fy/Fx

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

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Cart

Earth

Horse

Earth and cart

What gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

Least count of digital stop watch is.

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0.01 sec

0.1 sec

1 sec

10 sec

Dull black surface is a best:

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Emitter

Absorber

Reflector

None of these

Pressure is quantity:

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Scalar

Vector

Constnat

Dependent

The energy released int he form of nuclear radiations in addition to heat and light is called:

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Mechanical energy

Gravitational energy

Chemical energy

Nuclear energy

The motion of a body about an axis is called.

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Random motion

Vibratory motion

Rotatory motion

Circular motion

The static fraction between wood and lather is _______________

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0.6

0.7

0.9

0.8

The force which complete a body to move in circle is:

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Centripetal force

Centrifugal force

Perpendicular force

Tension

To every action there is always an equal but __________ reaction:

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Same

Parallel

Opposite

Equal

The unit of acceleration is.

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ms-1

ms

ms^-2

ms²

If Fy = 4 N and Fx = 3 N , what is the magnitude of resolution of force.

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5 N

7 N

10 N

15N

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

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