Advertisements
Advertisements
प्रश्न
Why does a coin, placed on a card, drop into the tumbler when the card is rapidly flicked with a finger?
Advertisements
उत्तर
The reason is that when the card is flicked, a momentary force acts on the card, so it moves away. However, the coin kept on it does not share the motion at once and it remains stationary at its place due to the inertia of rest. The coin then falls down into the tumbler due to the pull of gravity.
APPEARS IN
संबंधित प्रश्न
In the following example, try to identify the number of times the velocity of the ball changes:
“A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team”.
Also identify the agent supplying the force in each case.
Calculate the momentum of the following :
(a) an elephant of mass 2000 kg moving at 5 m/s
(b) a bullet of mass 0.02 kg moving at 400 m/s
What is meant by the term inertia?
Name the two kinds of inertia.
Give one example of each of the following :
(a) inertia of rest, and (b) inertia of motion .
Explain the following :
When a corridor train suddenly starts , the sliding doors of some compartments may open .
Give two examples of inertia kinds.
Multiple Choice Question. Select the correct option.
When you kick a stone, you get hurt. Due to which property this happens?
The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be ______ kg.
A man of mass 100 kg has a weight of ______ at the surface of the Earth.
