A 75 kg person gets into an elevator at the lobby level of a hotel together with his 35 kg suitcase and gets out at the 10th floor which is 30 m above the lobby. Determine: a. The amount of energy consumed by the motor of the elevator that is now stored in the suitcase on the 10th floor. b. I the travel from the lobby to the 10th floor took 15 seconds, the weight of the elevator is 220 lbf, and the elevator passenger compartment travels at constant velocity as it is being pulled by a cable, determine the work, in J, and the power needed, in kW.

the total distance traveled by the car is

30km + 49km = 79 km .

does anyone know or what?

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.