Suppose you are inside the water in a swimming pool near an edge. A friend is standing on the edge. Do you find your friend taller or shorter than his usual height ?

Suppose you are standing on the edge of a spinning platform and step off at right angles to the edge (radially outward). Now consider it the other way. You are standing on the ground next to a spinning carousel and you step onto the platform at right angles to the edge (radially inward).

Suppose you are standing on a boat in the middle of a swimming pool. The boat is loaded with a bag of stones. Can you get to the shore using the stones ? If yes, explain the concept behind it.

Suppose you are riding a bike with a speed of 10 m s^(-1) relative to a person A , person A who is walking on the ground towards east. If your friend B walking on the ground due west measures you speed as 15 m s^(-1) , find the relative velocity between two refence frames A and B .

A dics is rotating in a room. A boy standing near the rim of the disc of radius R finds the water droplet falling from the ceiling is always falling on his head. As one drop hits his head, other one starts from the ceiling. If height of the roof above his head is H , then angular velocity of the disc is

Suppose you and your friend are on the Moon. Will you be able to hear any sound produced by your friend ?

Can you hear your own words if you are standing in a perfect vacuum ? Can you hear your, friend in the same conditions ?

Assertion : On moon you cannot hear your friend standing at some distance from you. Reason : There is a vacuum on moon.

With the use of Archimedes' Principle, state how you will find relative density of a solid denser than water and insoluble in it. How will you modify your experiment if the solid is soluble in water?

The yield point of a typical solid is about 1%. Suppose you are lying horizontally and two persons are pulling your hands and two persons are pulling your legs along your own length. How much will be the increase in your length if the strain is 1% ? Do you think your yield point is 1% or much less than that ?

A fish is looking at a 1*0 m high plant at the edge of a pond. Will the plant appear to the fish shorter or taller than its actual height ? Draw a ray diagram to support your answer.