1. The problem statement, all variables and given/known data Calculate the maximum gravitational attraction between a man and an apple, when a) the apple was 1m from the man's center of mass, b) the apple hit his head. (man's mass 60kg, apple mass 100g) 2. Relevant equations F=G(m_1)(m_2)/r^2 F=ma 3. The attempt at a solution I set up the problem using the first equation F=((6.67x10^-11)*(60kg)*(0.1kg))/1 meter which came out to 4.002*10^-10. And for when the apple hit his head I got zero because F=((6.67x10^-11)*(60kg)*(0.1kg))/0. I guess my first question is would there be no gravitational attraction between the apple and the man when they are in contact? Does the gravitational attraction now become a weight force and normal force that cancel out?