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

The resultant vector of given vectors A and B is

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States of equilibrium are:

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2

3

4

5

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

To find x component of force 'F' we use formul:

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F Sin 𝜽

F Cos 𝜽

F tan 𝜽

F/F1

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

A couple consists of which type of forces :

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Like parallel

Unlike parallel

Not parallel

Nil

Complete equation fy/fx =

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Sin𝜽

Cos 𝜽

Tan𝜽

Cos ec𝜽

_____________ is centre from which its mass is equally distributed:

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Cebtre of mass

Centre of gravity

All of above

None

Clockwise torque is taken:

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Positive

Negative

Neutral

Nil

After tilting if body come back to its original position then the body is in:

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Stable equilibrium

unstable equilibrium

Neutral equilibrium

Equilibrium

Centre of gravity of sphere is at:

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Centre of sphere

Outside of sphere

Radius of sphere

None of these

Unit of moment arm (L) is:

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Meter

Mole

Newton

Nm

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Physics 9th Class English Medium Unit 4 Online Test MCQs With Answers

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