Q. A particle of mass lies at a distance from the centre of earth. The force of attraction between the particle and earth as a function of distance is ,

Gravitation Report Error

A

for

B

for

C

for

D

for

Solution:

Outside the earth surface, as varies inversely proportional to square of the distance from center of earth option (A) is correct and inside the earth as varies as directly proportional to the distance option (C) is correct.

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2. Assertion : Planet is a heavenly body revolving round the sun.
Reason : Star is luminous body made of gaseous material.

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3. If , and represent the work done in moving a particle from to along three different paths , and (as shown in fig) in the gravitational field of the point mass . Find the correct relation between , and

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4. A projectile is fired from the surface of the Earth of radius with a velocity , where is the escape velocity and . Neglecting the air resistance, the orbital velocity of the projectile is

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5. The effect of rotation of the Earth on the value of acceleration due to gravity is

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(density of mercury

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