(Conceptual exploration of the rate at which work is done) Answer the following…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
(Conceptual exploration of the rate at which work is done)
Answer the following questions about mechanical power in constant–acceleration motion.
(i) Define average power and instantaneous power.
(ii) State two distinct points of difference between average power and instantaneous power.
(iii) A body of mass m is initially at rest on a smooth horizontal surface. It is acted upon by a constant horizontal force F. Show, with suitable reasoning, that the instantaneous power delivered by the force at time t after the motion begins is directly proportional to t.