Question

A planet has the same mass as that of Earth but radius half that of Earth. If the value of acceleration due to
Tavity on the surface of Earth is g. then the value of acceleration due to gravity on the planet is.
​

Answer 1

Answer:

Acceleration of gravity of earth, g=

R

e

2

GM

e

=9.81ms

−2

Acceleration of gravity on planet, g

′

=

R

p

2

GM

p

=

(R

e

/2)

2

G(M

e

/2)

=2g=19.6ms

−2

Hence, acceleration is 19.6ms

−2