Assignment Instructions/ Description
�a) An electric hoist provides 2.5 x 10^3 W of power to lift a 170-kg sack vertically upwards in�2.5 seconds. To what height has the sack been lifted?�b) The energy required by the motor to accomplish this task is 30 000 J. What is the efficiency of the elevator?�(Note please write given and the conclusion statement and pls give the answer fast)