4. If the 70 Kg runner of # 1 took 30 seconds to change its speed, then what force caused the change in momentum?

Question 1(multiple choice worth 2 points) in order to be considered work, the components that must be present are • a force and a movement in the same direction as the force an action which causes movement and an opposite reaction an action which causes no movement or reaction a force and a movement in the opposite direction of the force