Nelda walks from the Big Pine neighborhood to school every morning. Jonah walks from the Stone Creek neighborhood to school every morning. They both leave at the same time, but Nelda always arrives before Jonah. What other information is needed to determine who walks the fastest?

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

If the woman is just hanging off the bar then i think each arm will support 350n  and if she accelerates 1400n