Give scientific reasons:
A bicycle moving fast on a levelled road moves up to a certain height on an uphill road even without its being pedalled.

Give Scientific reasons: A moving ball hits a stationary ball and displaces it

Give scientific reasons : When a burning stick of incense is moved fast in a circle , a circle of red light is seen.

Give scientific reasons: Even though a heat is supplied to boiling water, there is no increase in its temperature.

Give scientific reasons: When you enter a warm room after being outside on a frosty early morning ,your spectacles ' steam up'.

Give scientific reasons for the following: Dust and other small particles are attached by a plastic comb which has been moved vigorously through dry hair.

The arrangement of keeping road surface,inclined with the horizontal by raising its outer edge through.certain height 'h' than inner edge, when the road is curved is called as

Why doensn't the stone move up all the time? Why does it fall down after reaching a certain height?

Solve the following examples: If the energy required to move a body of mass 1 kg from the ground level to a certain height is 49 J, find the height.

i. Will the velocity of a stone thrown vertically upwards remian constant or will it change with time? How will it change? ii. Why doesn't the stone move up all the time? Why does it fall down after reaching a certain height? iii. What does its maximum height depend on?