Question

The mass and diameter of a planet are twice those of the earth. What will be
acceleration due to gravity at the planet, if acceleration due to gravity on the earth is
'g'​

Answer 1

Answer:

4.9 m/sec

2

g=

R

2

GM

g∝

R

2

M

g

g

′

=

M

M

′

(

R

′

R

)

2

=(

M

2M

)(

2R

R

)

2

=

2

1

⟹g

′

=

2

g

=

2

9.8

=4.9 m/s

2