# Physics MCQs for Class 9 with Answers Chapter 2

#### 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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