Question

1. Kicking a football is an example of
(a) Muscular force (b) Contact force (C) change of state of motion (d) all of these
2. Pull of gravity is a measure of a body
(a) Mass (b) weight (c) height (d) color
3. Identify the correct relation
(a) Rolling friction > static friction (b) static friction< sliding friction (c) rolling friction <
sliding friction (d) rolling friction =sliding friction
4. Liquid and gases are called............... ?
5. If the same force is made to act on small area, then the pressure will be............
6. Unit of pressure has been named after which scientist
7. The earth revolve around the Sun due to?.
8. What is pressure?
9. Explain why sliding friction is less than static friction?
10. Riya applies a force of 36 N on an area of 4 m². How much pressure does she produce?
11. distinguish between magnetic force and electrostatic force.
12 ( write two advantages and two disadvantage of friction.
(11) Define the following term
(a) Manometer (b) Drag
13. Give reason for each of the following
(a) heavy trucks have 6 to 8 tyres.
(b) Aeroplane and cars are given streamlined shape.
(c) Machine parts are oiled Occasionally... plz tell me the answer it's very urgent​

Answer 1

Answer:

1. all of these

2. mass

3.

Answer 2

Answer:

mechanical force is the answer for the first one