A physics project investigates how the speed produced depends on the mass of the…
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A physics project investigates how the speed produced depends on the mass of the object when the same amount of work is done.
(i) Show that, for a fixed amount of work W, the speed v acquired by a body starting from rest is inversely proportional to the square root of its mass m.
(ii) Two metallic balls of masses 200g and 800g are launched from the same apparatus. Each ball receives 1600J of work while starting from rest. Calculate the launch speed of each ball.
(iii) Compare the kinetic energies finally possessed by the two balls and comment on your result.