Physics MCQs for Class 9 with Answers Chapter 3

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A body is in neutral equilibrium when its centre of gravity:
Is at its highest position
Is at the lowest position
Keep its height if displaced
Is situated at its bottom

The measure of an object tendency to rotate about same axis is :
Force
Moment arm
Torque
None of these

Unit of moment arm (L) is:
Meter
Mole
Newton
Nm

States of equilibrium are:
2
3
4
5

When equal opposite forces are added then the resultant force is ______________
Double
Triple
Zero
None of these

if force on body on y-axis is 100N than x-axis is:
1000 N
200 N
600 N
0 N

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

A couple is formed by:
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

The method used for addition of non-parallel forces is.
Algebraic
Head to trail rule
Mathematical
Nil

Perpendicular / hypotenuse is equal to:
Cosθ
Tanθ
Cosecθ
Sinθ

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