Question

Consider a heavenly body which has a mass twice that of the earth and radius thricethat of the earth .What will be the weight of the book on this heavenly body, if its
weight on earth is 900 N?

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Answer 1

g = GM / R^2

where

g = acceleration due to gravity

G = Un usual gravitational content

M = Mass of the Earth

R = Radius of the Eart

we know

W = m . g

=> W = m . (GM / R^2)

=> 900 = m . (GM / R^2)

=> (GM / R^2) = 900/m. ___ equation 1

When M become 2M and R become 3R,

g = GM / R^2

= G.(2M) / (3R)^2

= (2GM) / (9R^2)

= (2 × 900)/(9 m). (put the value ofeq. 1)

g = 200/m

now,

w = m . g

w = m . (200/m)

w = 200 N. (ans.)

Answer 2

Answer:

Explanation:

hope it helps..