1. If a motorcycle accelerates too rapidly, its front wheel will rise up off the pavement. During this stunt, the pavement is exerting a forward frictional force on the rear wheel. How does that frictional force cause the front wheel to rise? 2. Most racing cars are built very low to the ground. While this design reduces air resistance, it also gives the cars better dynamic stability on turns. Why are these low cars more stable than taller cars with similar wheel spacings? 3. If the bottom of your bicycle's front wheel becomes caught in a storm drain, your bicycle may flip over so that you travel forward over the front wheel. Explain this effect in terms of rotation, torque, and center of mass. 4. Sprinters start their races from a crouched position with their bodies well forward of their feet. This position allows them to accelerate quickly without tipping over backward. Explain this effect in terms of torque and center of mass. 5. The starter motor in your car is attached to a small gear. This gear meshes with a large gear that is attached to the engine's crankshaft. The starter motor must turn many times to make the