A man and his friend have masses 70kg and 60kg respectively. If they are seated 1.0m apart, calculate the gravitational force of attraction between them. (G = 6.67 x 10-11 Nm2 kg-2)
a
1.59 x 10-14 N
b
2.80 x 10-7 N
c
1.30 x 10-2 N
d
6.30 x 1013 N
Explanation
Correct Option
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Clifford005
4 years ago
F=GMmr²
where G= gravitational constant
M= first mass
m= second mass
r²= the radius
F= 6.67x10^-11 x 70 x 60 x 1
F= 28014x10^-11
by law of indices
F= 2.80x10^-7
