The free-body diagram below represents the forces of several vehicles driving across a bridge . Assume that the bridge is in static equilibrium and that it has zero weight and solve for the unknown reaction force.

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

Can anybody me with this? ? (picture included.)