Question

A ball is thrown vertically upward rises to a height of 20m calculate its average kinetic energy

Answer 1

Suppose mass of ball is ‘m’ and initial velocity is ‘v’.Half of its KE in terms of gravitational potential energy is given as

(1/2)(1/2) mv^2=mgh.

Or. h=v^2/4g=(20×20)/(4×10) m

Or h=10m