Question

calculate the force of gravitation due to earth on a ball of mass 60 kg. (mass of earth = 6 x 10^24kg and radius of earth = 6.4 x 10^3km.

Answer 1

Answer:

Gravitational force between earth and ball,

=  

R  

2

 

GMm

​

 [Neglecting the radius of ball as it is small]

=  

(6400×10  

3

)  

2

 

6.67×10  

−11

×6×10  

24

×1

​

 

=  

10  

10

 

9.77×10  

−3

×10  

−11

×10  

29

 

​

=9.77N

Explanation: