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प्रश्न
Explain the following:
Why do fruits fall off the branches in the strong wind?
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उत्तर
When a carpet is beaten with a stick, then carpet comes in motion but dust particles present on them try to remain at rest because of inertia of rest and hence the dust fly off. Strong winds slake the branches of a tree, laden with fruits, vigorously. As a result, branches come in motion but fruits try to remain at rest due to inertia of rest and hence get detached from the tree and fall off.
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संबंधित प्रश्न
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
Explain why, a person travelling in a bus falls forward when the bus stops suddenly.
The inertia of an object tends to cause an object :
The physical quantity which makes it easier to accelerate a small car than a large car is measured in the unit of :
Dust particles are removed from a carpet by beating it.
Multiple Choice Question. Select the correct option.
Inertia is the property of a body by virtue of which the body is:
Inertia of a body depends on
Assertion & Reasoning
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- Reason: ‘g’ depends on the mass of the object and the Earth.
Two blocks of masses 8 kg and 2 kg respectively lie on a smooth horizontal surface in contact with one other. They are pushed by a horizontally applied force of 15 N. Calculate the force exerted on the 2 kg mass.
A heavy truck and bike are moving with the same kinetic energy. If the mass of the truck is four times that of the bike, then calculate the ratio of their momenta. (Ratio of momenta = 2:1)
