Suppose we instead defined our system to be just bob. compared to when the system was defined to be bob+cart, how would things be different for the collision of bob with the cart?
a. the momentum of the system is no longer conserved
b. the system's change in momentum is different
c. the impulse on the system is different
d. b and c are correct
e. a, b, and c are correct

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d