a (7%) Problem 4: Consider applying Newton's second law to a man riding an elevator (perhaps to calculate his acceleration). D & Which of the following forces must be considered? Choose all that apply. C] The force of gravity on the elevator C] The force that the elevator oor exerts on the man's feet C] The force that the man's feet exert on the oor of the elevator C] The force that the man's head exerts on his neck C] The force the elevator cable exerts on the elevator car C] The force of gravity on the man (7%) Problem 5: A man has a weight of 735 N, and the ground pushes up on him with 735 N. D a What can be said about these two forces? 0 The forces are not equal in any way. 0 The forces are equal. 0 The forces have equal magnitude