Which of the following has the largest m/mentum? A. The total building of Campbell High School, including the trailers and construction areas.
B. A dog running down the street.
c. A tightrope walker crossing Niagara Falls.
D. A pickup truck traveling down the highway.
E. A semi-truck parked at a gas station.

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.