Punjab 9th Class Physics Chapter 3 Dynamics Mcqs Test Online

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Question 1 of 9

Physics

1. Which of the following is the unit of momentum is:

kgms⁻²

Nm

Ns

Ns⁻¹

Question 1 of 9

Question 2 of 9

2. Which of the following material lowers friction when pushed between metal plates?

water

air

oil

fine marble powder

Question 2 of 9

Question 3 of 9

3. Two bodies of masses m₁ and m₂ attached to the ends of an inextensible string passing over a frictionless pulley such that both move vertically. The acceleration of the bodies is:

m₁ x m₂/m₁+m₂ g

2m₁ m₂/m₁+m₂ g

m₁ + m₂/m₁–m₂ g

m₁ – m₂/m₁+m₂ g

Question 3 of 9

Question 4 of 9

4. Inertia depends upon:

net force

mass

force

velocity

Question 4 of 9

Question 5 of 9

5. When a horse pulls a cart, the action is on the:

earth

earth and cart

horse

cart

Question 5 of 9

Question 6 of 9

6. Newton’s first Law of motion is valid only in the absence of:

friction

net force

force

momentum

Question 6 of 9

Question 7 of 9

7. A boy jumps out of a moving bus. There is a danger for him to all:

in the direction of motion

opposite to the direction of motion

towards the moving bus

away from the bus

Question 7 of 9

Question 8 of 9

8. The mass of a body:

decreases when moving with high velocity

opposite to the direction of motion

increases when accelerated

decreases when accelerated

Question 8 of 9

Question 9 of 9

9. A string is stretched by two equal and opposite forces of 10 N each. The tension in the string is:

20 N

zero

5N

10N

Question 9 of 9

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