Physics MCQs for Class 9 with Answers
Cos 0°=
0.5
1
0.866
0
The force with which Earth attracts the object towards its center is known as
Force
Weight
Mass
Gravity
A body is in equilibrium when its:
Acceleration in uniform
speed in uniform
Speed and Acceleration are uniform
Acceleration is Zero.
Resultant vector can be found by:
θ=tan-1 Fy/ Fx
θ=tan[Fy/ Fx ]
θ=tan-1[ Fy/ Fj ]
None of these
Centre of gravity of uniform square is:
Intersection of diagonals
Point of intersection of medians
At centre
None of these
Parallel forces are those whose:
Times of action are parallel
Points of action are different
More than one forces
All of the given option
The symbol of sigma is :
Σ
m
=
$
Which is not an example of torque?
Opening a nut
Door opening
Picking up a toy
All of them
Centre of gravity of sphere is at:
Centre of sphere
Outside of sphere
Radius of sphere
None of these
A force of 10 N is making an angle of 30o with the horizontal. Its horizontal component will be
4N
5N
7N
8.7N
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