3. Your best friend is in this Physical Science class and bet that he could tell your mass without using a device to show your mass. You are jumping for a layup in a backyard basketball court.
What does he need to know to solve this problem?

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.