Blake has a mass of 72kg and Denise has a mass of 53kg. Blake and Denise are standing 2 meters apart on the dance floor. Denise looks up and sees Blake. She feels an attraction. (a) Find the magnitude of the gravitational force of attraction between them.

6.36*10^-8 N

Explanation:

The magnitude of gravitational force of attraction is usually given by the formula

F = Gm1m2/r², where

F = magnitude of the force required

G = gravitational constant, 6.67*10^-11 m3 kg^-1 s^-2

m1 = mass of the first body, 72 kg

m2 = mass of the second body, 53 kg

r = radius between the bodies themselves, 2 m

Now, when we apply the formula directly, we get

F = (6.67*10^-11 * 72 * 53) / 2²

F = (6.67*10^-11 * 3816) / 4

F = 2.55*10^-7 / 4

F = 6.36*10^-8 N

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