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

Question # 1

Sin 45^ois

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0.707

0.5

0.2

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Question # 2

Tan 90°=

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Infinity

0.866

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Question # 3

The product of force and momentum arm is called:

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Couple arm

Torque

Rigid body

Axis of rotation

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Question # 4

Cos 0^ois

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0.5

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Question # 5

If the applied force is 'F' and its moment arm is 'r' then torque is defined as

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τ = rF

τ = r2F

τ = r + F

τ = 2rF

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Question # 6

Perpendicular / hypotenuse is equal to:

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Cosθ

Tanθ

Cosecθ

Sinθ

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Question # 7

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

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Question # 8

The centre of gravity of hollow cylinder is the middle point on its:

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Curved side

axis

Bottom

On upper side

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Question # 9

The forces that are parallel to each other and have the same direction are called:

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Like parallel forces

Unlike parallel forces

Resultant forces

Net forces

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Question # 10

Base / Hypotenuse is called:

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Sin𝜽

Cos 𝜽

Tan 𝜽

Cot 𝜽

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Question # 11

The net torque acting on a rotating body with uniform speed is:

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Question # 12

The force with which Earth attracts the object towards its center is known as

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Force

Weight

Mass

Gravity

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Question # 13

The single force that has the same effect as the combined effect of all the force to be added is called a

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Opposite force

Single force

Resultant force

Resultant vector

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