A12,000-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.6 m/s2. at an altitude of 158 m the craft's downward velocity is 16.9 m/s. to slow down the craft, a retrorocket is firing to provide an upward thrust. assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface. in newtons.

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Newtons view of arrangement of the universe. don't copy from anywhere.

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.