Read the following statements about the standard textbook proof for the formula of…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Read the following statements about the standard textbook proof for the formula of kinetic energy and answer the questions that follow.
(i) State any two assumptions made before starting the proof.
(ii) Describe how the displacement s of the body is expressed in terms of its initial speed u, final speed v and uniform acceleration a.
(iii) Show algebraically why the acceleration a does not appear in the final expression for the work done on the body, although it was present in the intermediate steps of the proof.