A worker lifts two different cartons from the ground onto a loading platform
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A worker lifts two different cartons from the ground onto a loading platform. Use the data given below to solve the following:
(a) The first carton has a mass of 20kg. The worker performs 1.96×103J of work in lifting it at a steady speed. Calculate the height of the platform. Take g=9.8ms−2.
(b) The second carton has a mass of 15kg and is lifted to twice the height calculated in part (a). Determine the work done on the second carton.
(c) Find the ratio of the mechanical energies gained by the two cartons during their respective lifts.