CHALLENGE A winch designed to be mounted on a truck, as shown in Figure 8, is advertised as being able
to exert a 6.8x103-N force and to develop a power of
0.30 kW. How long would it take the truck and the
winch to pull an object 15 m?

What is the measure of a change in an objects velocity?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?