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प्रश्न
Explain the following:
Why does dust fly off, when a carpet is hit with a stick?
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उत्तर
Because of the sudden movement, the clothes moves, but dust on account of the inertia of rest is left behind.
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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.
Name the property of bodies (or objects) to resist a change in their state of rest or of motion.
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
The physical quantity which makes it easier to accelerate a small car than a large car is measured in the unit of :
Give two examples to show that greater the mass, greater is the inertia of the body.
Why does a person fall when he jumps out from a moving train ?
Why does a ball thrown vertically upwards in a moving train , come back to the thrower's hand ?
Explain the following :
When a corridor train suddenly starts , the sliding doors of some compartments may open .
Explain the following :
It is advantageous to run before taking a long jump .
What do you understand by the term inertia?
