Physics MCQs for Class 9 with Answers
Rocket works on principle of ______________
Action Reaction
Law of inertia
Mass energy
Nil
The unit of π is:
N
m
s
None
In circular motion, the motion of every particle of body is.
Direction
Opposite
Same
None of these
How much force is needed to body of mass 10 kg from falling:
100 N
150 N
200 N
300 N
The force which keeps a body to move in a circle is called
Gravitational force
Centripetal force
Centrifugal force
Rotational force
The amount of matter in a body is called:
Velocity
Momentum
Mass
Force
The centripetal acceleration is always along.
Normal force
Centripetal forces
Mass
Horizental forces
Formula of weight is derived from which law?
First law
Second law
Third law
Law of conservation of momentum
S.I unit of weight is:
kg
m
N
K
The Atwood machine can be used to find the acceleration due to gravity using the equation
g = 2 (m1 x m2)/(m1 + m2) a
g = (m1 – m2)/(m1 + m2) a
g = (m1 + m2)/(m1 – m2) a
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