PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A net force is applied to a body of mass 25 kg. The body's speed changes from 10 m s−1 to 20 m s−1.
(a) State the work–energy principle.
(b) Use the work–energy principle to calculate the net work done on the body.
(c) Suggest why the net work done on the body cannot be calculated using another method; for example, using the equations of kinematics (SUVAT equations).