Choose the correct statement from the following :Weightlessness of an astronaut moving in a satellite is a situation of
Zero $g$
No gravity
Zero mass
Free fall
(d)
If $R$ is the radius of the earth and $g$ the acceleration due to gravity on the earth's surface, the mean density of the earth is
If density of earth increased $4 $ times and its radius become half of what it is, our weight will
As we go from the equator to the poles, the value of $g$
Taking density of Earth constant.Which graph correctly presents the variation of acceleration due to gravity with the distance from the centre of the earth (radius of the earth $= R_E$ )?
Find the gravitational field at a distance of $2000\, km$ from centre of earth. (in $m / s ^{2}$)
(Given $\left.R_{\text {earth }}=6400 km , r =2000 km , M _{\text {earth }}=6 \times 10^{24} kg \right)$
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