ANSWER FOR QUESTION 3: The answer would be B.) because work or energy, is equal to the work done by a force, like the ball.
ANSWER FOR QUESTION 4: The answer would be D.) because when a ball roles down a hill the work to push that ball can transfer energy between the ball or other objects and cause the change in the total amount of energy used.
ANSWER FOR QUESTION 5: The answer is mechanical, because both physical and constant, kenitic and potential.
