2, In which case do law of inertia illustrated? A.A person jumps to a dock from a boat, the boat moves away from the dock. B.A ping pong ball accelerates faster than a golf ball when hit with the same force. C.A galloping horse comes to a sudden stop. Its rider is thrown over the head of the horse and lands on the ground. D.All of the above 3.Which of the following best explains Newton's second law of motion? A. For every action, there is an equal and opposite reaction. B, A body will remain at rest or move at constant velocity unless acted upon by an external net or unbalanced force. C.The acceleration of an object is directly proportional to the magnitude of the net force acting on it and is inversely proportional to its mass. D. All of the above. 4.If the applied force is constant, what can you say about the mass and acceleration? A.equal B. not related C. directly proportional D. inversely proportional​