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A man and his friend have masses 70kg and 60kg respectively....

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

Correct answer is B

F = \frac{GM_1M_}{r^2}

= \6.67 \times 10^{-11} \times 70 \times 60}{1^2}

= 2.8014 x 10-7 N