Question

A 65 kg sprinter completes a 100 m race in 9.83 s. Calculate the average kinetic energy of the sprinter

Answer 1

51058, Physics, Mechanics — Kinematics — Dynamics

Question A 65 kg sprinter completes a 100 m race in 9.83 s. Calculate the average kinetic energy of the sprinter.

Solution Average speed is

$v=\frac{s}{t}=\frac{100}{9.83}\approx 10.17\,m/s$

Hence, average energy is

$E=\frac{mv^{2}}{2}=\frac{65\cdot 10.17^{2}}{2}\approx 3363.38\,J$

http://www.AssignmentExpert.com/