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Class XI Physics Gravitation 2

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Question 1

If the earth suddenly stops rotating, the value of g at any place will -

Question 2

The height at which the acceleration due to gravity becomes

(where g = the acceleration due to gravity on the surface of the earth) in terms of R, the radius of the earth, is :

Question 3

If radius of earth were to shrink by one percent, its mass remaining same, the acceleration due to gravity on the earth’s surface would

Question 4

A radar has a power of 1 Kw and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500m. The maximum distance (in km) upto which it can detect object located on the surface of the earth (Radius of earth =

Question 5

Suppose gravitational force varies

inversely as n^th power of distance. The square of time period of a planet in a circular orbit of radius R around the sun will be proportional to–

Question 6

A spherical shell is cut into two pieces along a chord as shown in figure. If I denote the gravitational field strength, then for points P and Q -

Question 7

Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is

Question 8

Imagine a light planet revolving around a very massive star in a circular orbit of radius r with a period of revolution T. If the gravitational force of attraction between planet and star is proportional to R^–5/2, then T² is proportional to-

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Aug 17JEE & BITSAT