A professional boxer hits has opponent with a 1150-N horizontal blow that lasts

Question

A professional boxer hits has opponent with a 1150-N horizontal blow that lasts for 0.14 s. Calculate the impulse imparted by this blow, in kilogram meters per second. What is the opponent's final speed, in meters per second, if lus mass is 102.5 kg and he was at rest when struck near lus center of mass? Now assume that just the opponent's head, with a mass of 5.24 kg. was lut in this manner. Calculate the final speed of lus head, m meters per second, assuming the head does not initially transfer significant momentum to the boxer's body

Explanation / Answer

apply from Impulse momentum theorem

impulse J = Fs = change in momentum

so

part B :

Impulse J = 1150 * 0.14

J = 161 Ns

------------------------

use MV = J = 161

speed V = 161/5.24

V = 30.72 m/s

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