A spring of stiffness k = 500 N/m is mounted between a wall and a 80 kg block as shown. There is no friction on any surface. If the block is subjected to a 500
N force at 60 degrees above the horizontal, determine the normal force acting
on the block and the distance the spring compresses.

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.