Question

A graph model shows the force on the hockey when the racket hits the puck in a shot. The disc weighs 160 g and is at rest before hitting. What is the speed of the puck after hitting? Give the answer using km/h

Answer 1

To get Kinetic Energy,

$=160×9.8=1568J$

$KE=$ $\frac{1} {2} mv^2$

$1568=0.5×160×v^2$

$V^2=19.6m^2/s^2$

$V=4.427km/hr.$