1. If a golf ball and a Ping-Pong ball move with the same kinetic energy, which has the greater speed? Explain. 2. In grandpa's time automobiles were previously manufactured to be as rigid as possible, whereas autos are not designed to crumple upon impact. Why? 3. Why is charge usually transferred by electrons rather than by protons? 4. Why are the wingspans of birds a consideration in determining the spacing between parallel wires on power poles? 5. Magnet A has twice the magnetic field strength of magnet B, and at a certain distance it pulls on magnet B with a force of 50 N. With how much force does magnet B then pull on magnet A? Explain