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Physics Chapter 3 MCQs Notes
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Class 9 Physics Chapter 3 MCQs Notes
1: Newton’s first law of motion is valid only in the absence of:
(b) net force
2: Inertia depends upon
(b) net force
3: A boy jumps out of a moving bus. There is a danger for him to fall:
(a) towards the moving bus
(b) away from the bus
(c) in the direction of motion
(d) opposite to the direction of motion
4: Two bodies of masses m and m 1 2 attached to the ends of an inextensible string passing over a frictionless pulling such that both move vertically. The acceleration of the bodies is:
Which of the following is the unit of momentum?
kgms -1 (c)
Ns (d) Ns
5: When a horse pulls a cart, the action is on the:
(d) Earth and cart
6: Which of the following materials lowers friction when pushed between metal plates?
(b) fine marble powder
7: A string is stretched by two equal and opposite forces 10 N each. The tension in the string is
(b) 5 N
(c) 10 N
(d) 20 N
8: The mass of a body:
(a) decreases when accelerated
(b) increases when accelerated
9th Class Physics Chapter 3 MCQs Notes PDF Download
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