Q1. A 100 percent efficient electric motor is lifting a 15N weight at 25cm/s. If the motor is connected to a 7V battery, how much current does it draw?
Q2. A storage tank 25 m high is filled with gasoline. (a) Find out the gauge pressure at the bottom of the tank. (b) Compute the force that acts on a square access hatch at the bottom of the tank that measures 0.25m by 0.25m.