Question

For each of the following examples, tell me whether you the work done by the indicated force to be always negative, always positive, always zero or to vary over the course of the indicated time. In each case, please justify your answers. a. The tension in Spider-Man's webline as he swings from the top of a building to the ground. b. The force of air resistance as Spider-Man swings from the top of a building to the ground. c. The force of gravity you drive your car up a hill. d. The work done by a rubber ball as it bounces on the floor. e. The work done by a baseball player while his bat is in contact with the ball.

Answer 1