2 Points
Why is a short circuit dangerous?
O
AlimIt opens a circuit and stops the current.
O
B. It increases the resistance in the circuit.
C. It prevents a circuit from working.
D. It results in a very large current.

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.