Two identical tower cranes are tested for performance
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Two identical tower cranes are tested for performance.
Crane A lifts a 2000kg concrete block vertically through 10m in 25s.
Crane B lifts a 2500kg block through 12m in 35s.
Take g=9.8ms−2.
(i) Calculate the work done by each crane in its respective lift.
(ii) Determine the average power developed by each crane during the lift.
(iii) Which crane is more powerful and by how much (in kW)?