Question

Find the gravitational force exerted by earth on an object of mass 10kg placed on its surface.(6×10²⁴ kg, radius of earth= 6×10⁶m)

Answer 1

Answer:

9.77 N

Explanation:

Given : Mass of earth    M=6×10  

24

 kg

                  Mass of object    m=1 kg

                 Radius of earth       R=6.4×10  

6

 m  

Force of gravitation between them, F=  

R  

2

 

GMm

​

 

F=  

(6.4×10  

6

)  

2

 

6.67×10  

−11

×(6×10  

24

)×1

​

=9.77 N

Answer 2

Answer:

9.77N

Explanation:

Given : Mass of earth    M=6×10  

24

kg

                 Mass of object    m=1 kg

                Radius of earth       R=6.4×10  

6

m  

Force of gravitation between them, F=  

R  

2

 

GMm

​

 

F=  

(6.4×10  

6

)  

2

 

6.67×10  

−11

×(6×10  

24

)×1

​

=9.77 N