Two electric winches lift loads vertically at steady speeds
PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
Two electric winches lift loads vertically at steady speeds. Winch A produces a constant upward force of 200N and raises its load at 2m/s. Winch B exerts 100N and raises its load at 4m/s. Without performing explicit numerical multiplication, answer the following:
(i) Which winch delivers the greater power, or are they the same? Give reasons for your answer.
(ii) Explain qualitatively how a small force applied at high speed can deliver the same power as a large force applied at a lower speed.