Two identical hockey pucks

PHYSICS · Single correct · GCSE · Physics · Forces · Forces

Problem

Two identical hockey pucks, each of mass 0.20 kg0.20\,\text{kg}, slide on frictionless ice. Puck P moves due east at 5 m/s5\,\text{m/s} while puck Q moves due west at 5 m/s5\,\text{m/s}. What is the magnitude of the vector sum of their momenta? (a) 2 kg m s−12\,\text{kg\,m\,s}^{-1} (b) 0 kg m s−10\,\text{kg\,m\,s}^{-1} (c) 1 kg m s−11\,\text{kg\,m\,s}^{-1} (d) 4 kg m s−14\,\text{kg\,m\,s}^{-1}

Related theory

Browse the problem library