Physics MCQs for Class 9 with Answers Chapter 3

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Physics MCQs for Class 9 with Answers


Tan 90°=
Infinity
1
0
0.866

If the applied force is ‘F’ and its moment arm is ‘r’ then torque is defined as
τ = rF
τ = r2F
τ = r + F
τ = 2rF

A couple consists of which type of forces :
Like parallel
Unlike parallel
Not parallel
Nil

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:
17 N
10 N
7N
3 N

The condition of equilibrium are:
2
3
4
5

The resultant vector of given vectors A and B is

_____________ is related to earth attractive force.
Centre of gravity
Acceleration
Velocity
Nil

It base of a right angled triangle is 3 cm and its perpendicular is 3 cm.Then its hypotenuse will be
2 cm
4 cm
6 cm
5 cm

The product of force and momentum arm is called:
Couple arm
Torque
Rigid body
Axis of rotation

Perpendicular / Hypotenuse is called :
Cos ?
Sin ?
Tan ?
Tan-1 ?

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