I RLLY NEED HEL : A rusty pulley is used to lift a 2450 N motorcycle onto a transport truck. What is the efficiency of the pulley if 3500 N is used to lift the motorcycle 1.5 m onto the truck?

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?