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

Question # 1

A body is in equilibrium when its

Choose an answer

Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

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Question # 2

A couple is formed by:

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two forces perpendicular to each other

Two like parallel forces

To equal and opposite forces in the same line.

Two equal and opposite forces not in the same line

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Question # 3

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

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Question # 4

At what angle sin𝜽 and cos𝜽 has same values:

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30^o

45^o

60^o

90^o

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Question # 5

A couple consists of which type of forces :

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Like parallel

Unlike parallel

Not parallel

Nil

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Question # 6

When center of gravity is at the highest position body will be in:

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Neutral equilibrium

Stable equilibrium

Unstable equilibrium

None of these

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Question # 7

If Fx and Fy are rectangular components of a vector F, then the magnitude of vector F is:

[LHR-04 1st G]

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Question # 8

The number of perpendicular components of a force are

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Question # 9

Which is not an example of torque?

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Opening a nut

Door opening

Picking up a toy

All of them

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Question # 10

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 # 11

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 # 12

If base of a right angle triangle is 3 cm and perpendicular is 2 cm. What is tanθ

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0.7

1.5

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