1. How much work is required to increase the kinetic energy of a motor scooter by 4000 J? 2. Show that a 50-J change in kinetic energy occurs when a model airplane on takeoff is moved a distance of 5...

1. How much work is required to increase the kinetic energy of a motor scooter by 4000 J?

2. Show that a 50-J change in kinetic energy occurs when a model airplane on takeoff is moved a distance of 5 m by a sustained net force of 10 N.

3. The mass and speed of three vehicles, A, B, and C, are shown. Rank them from greatest to least for (a) momentum, (b) kinetic energy, (c) work done to bring them up to their respective speeds from rest.