Ravi and Seema each carry a bucket of water up a staircase of vertical height
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Ravi and Seema each carry a 10kg bucket of water up a staircase of vertical height 4m. Ravi takes 20s while Seema takes 12s. Which statement correctly compares their average power? (Take g=9.8m/s2.)
(a) Both have equal average power because they do the same work.
(b) Ravi’s average power is greater because he takes more time to do the work.
(c) Seema’s average power is greater because she does the same work in less time.
(d) Their average powers cannot be compared without knowing the force applied.