Change in acceleration due to gravity is same upto a height h from each other the earth surface and below depth x then relation between x and his ( h and x<<<Re )
x = h
x = 2h
x =
x = h2
B.
x = 2h
Variation in g at the height h from the earth surface
g' = g
Variation in g at a depth x below the earth surface
g'' = g
Here d = x i.e depth
But variations are same
∴ g
∴ x = 2h
A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected?
Which of the following statements is correct?
(a) Centre of the mass of a body always coincides with the centre of gravity of the body.
(b) Centre of the mass of a body is the point at which the total gravitational torque on the body is zero
(c) A couple on a body produce both translational and rotational motion in a body.
(d) Mechanical advantage greater than one means that small effort can be used to lift a large load.
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:
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