Physics MCQs for Class 9 with Answers
Which of the following is the unit of momentum?
Nm
Kg ms-2
Ns
Ns-1
If no external force acting on a body then such system is called.
Ideal system
Controlled system
Isolated system
None
The product of mass and velocity is called …………….. .
Momentum
Force
Acceleration `
Nil
In symbols, Newton’s second law of motion is stated as
F = m/a
F = ma
F = a/m
F = ma2
When a horse pulls a cart , the action is on the :
Cart
Earth
Man
Earth & cart
Which machine is used to find acceleration due to gravity?
Centrifuge
Atwood machine
Hydraulic machine
Washing machine
The unit of momentum is :
kgms-1
kgms-2
m sec
None
The weight of body on earth with mass 8 kg is:
10 N
100 N
80 N
8 N
The mass of a body
Decreases when accelerated
Increases when accelerated
Decreases when moving with high velocity
None of the above
Rolling friction is___________ then sliding friction :
Greter
Less
Some
Half
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