A baseball is thrown straight upward from ground level with an initial speed of
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A 0.145kg baseball is thrown straight upward from ground level with an initial speed of 22ms−1. Ignore air resistance.
(a) Determine the maximum height the baseball reaches above the ground.
(b) Calculate the speed of the baseball when it is 15m above the ground on the way up.
(c) A student chooses the zero of gravitational potential energy to be at the top of the ball’s flight instead of at the ground. Calculate the ball’s gravitational potential energy and kinetic energy at launch using this new reference level, and comment on whether the total mechanical energy differs from that found using the ground as the reference.