A2‐lb slider is propelled upward at a along the fixed curved bar which lies in a vertical plane. if the slider is observed to have a speed of 10 ft/sec as it passes position b, determine (a) the magnitude n of the force exerted by the fixed rod on the slider and (b) the rate at which the speed of the slider is decreasing. assume that friction is negligible.

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.