Acompact car has a maximum acceleration of 4.0 m/s^2 when it carries only the driver and has a total mass of 1200 kg. what is its maximum acceleration after picking up four passengers and their luggage, adding an additional 400 kg of mass? (you only need to draw the free-body diagram with a fnet vector)

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.