PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy
Problem
Two students, A and B, each carry one bucket of water exerting a force of 150N vertically upward to a balcony 10m above the ground.
(i) Define power and state its SI unit.
(ii) Calculate the work done by each student in lifting the bucket.
(iii) Student A finishes the task in 20s whereas student B takes 15s. Determine the power developed by each student and state who has developed the greater power.
(iv) Explain, with reference to your numerical answers, why two persons doing the same amount of work in different times possess different power.