A hockey puck (puck P) slides on a nearly frictionless horizontal rink with a speed…
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A 0.16kg hockey puck (puck P) slides on a nearly frictionless horizontal rink with a speed of 6.0ms−1 due east and collides with an identical stationary puck Q. After the collision, puck P is observed to travel at 4.0ms−1 at an angle of 30∘ north of east.
(a) Resolve the momentum of puck P before and after the collision into east (x) and north (y) components.
(b) Determine the magnitude and direction (angle measured from east toward north) of the velocity of puck Q immediately after the collision.
(c) Calculate the total kinetic energy of the two‐puck system before and after the collision and state, with justification, whether the collision can be classified as elastic.