1. The problem statement, all variables and given/known data Question: An Elevator and its load have a mass of 1200 kg. a) what energy must be supplied to lif the elevator and its load ot a height of 100m? Answer: E = _________ Joules b)If the elevator rises at a speed of 5 m/s, how long does it take to cover 100m? Answer t= __________ sec c) What is the power supplied? Answer P = ________ Watts 2. Relevant equations Energy: E=MgL, where g=9.8m/s2 (squared) is the acceleration of gravity and Lis the distance through which a mass is moved against the force of gravity Power: P = E/t Intensity: I= P/A 3. The attempt at a solution My answers: For part a, I used the first equation (E=MgL) and I got the answer of 1176 Joules part b: at a rate of 5 m/s it would take 20 seconds; so t = 20 seconds Part c: P=E/t is P= 1176/20 = 58.5 watts Does this seem right?