Question # 1

Sin 45^ois

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0.707

0.5

1

0.2

_____________ is centre from which its mass is equally distributed:

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Cebtre of mass

Centre of gravity

All of above

None

When 10 N along positive x-axis and 7 N along negative x-axis are added by head to tail rule. The resultant force is:

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17 N

10 N

7N

3 N

Centre of gravity of uniform square is:

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Intersection of diagonals

Point of intersection of medians

At centre

None of these

Center of gravity of an irregular shaped body can be found with help of:

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Screw guage

Plumbline

Meter rode

Wedge

The condition of equilibrium are:

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2

3

4

5

.............. is example of vector.

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Length

Force

Mass

Time

It is useful to know the location of center of gravity of a body in problem dealing with

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Motion

Equilibrium

Charge

Velocity

To make a body more stable ________ should be lowered:

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Axis of rotation

Center of gravity

Stabilty

None

A force of 10 N is making and angle of 30^owith the horizontal. Its horizontal component will bw:

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4 N

5 N

7 N

8.7 N

The angle between rectangular components of a vector is

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0°

90°

180°

270°

A body is in equilibrium when its

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Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

Complete equation fy/fx =

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Sin𝜽

Cos 𝜽

Tan𝜽

Cos ec𝜽

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

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