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प्रश्न
What does a force do in the following case?
You twist a piece of rubber.
उत्तर
Force produces stretching in the rubber.
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संबंधित प्रश्न
Choose the correct alternative:
Acceleration due to gravity is independent of mass of the earth/mass of the body.
A tunnel is dug along a diameter of the earth. Find the force on a particle of mass m placed in the tunnel at a distance x from the centre.
Distinguish between gravity and gravitation
How will the force of gravitation between two objects change if the distance between them is:
Made four times
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
A ball is thrown up with a speed of 4.9 ms-1.
Calculate the maximum height it would gain before it begins to fall.
What is the difference between gravity and gravitation?
Answer the following question.
What are the dimensions of the universal gravitational constant?
Different points in earth are at slightly different distances from the sun and hence experience different forces due to gravitation. For a rigid body, we know that if various forces act at various points in it, the resultant motion is as if a net force acts on the c.m. (centre of mass) causing translation and a net torque at the c.m. causing rotation around an axis through the c.m. For the earth-sun system (approximating the earth as a uniform density sphere).
The gravitational force between a hollow spherical shell (of radius R and uniform density) and a point mass is F. Show the nature of F vs r graph where r is the distance of the point from the centre of the hollow spherical shell of uniform density.
