1) Is it possible to exert a force and yet not cause a change in kinetic energy? 2) If you drop a tennis ball onto a concrete floor, it will bounce back tarther than if you drop it on a rug. Where does the lost energy go when it strikes the rug? 3) A constant net force of 410 N, up, is applied to a stone that weighs 32 N. The upward force is applied through a distance of 2.0 m, and the stone is then released. To what height, from the point of release, will the stone rise? 4) A 35 kg child is jumping on a pogo stick. If the spring has a spring constant of 4945 N/m and it is compressed 25 cm, how high will the child bounce? (Assume that the mass of the pogo stick is negligible.)