Physics
Physics
Problem
A glider of mass 2.0 kg is moving at 10 m/s on a smooth horizontal air track towards a second glider of mass 3.0 kg that is initially at rest. The collision between the two gliders is perfectly elastic. a. (i) Calculate the speed and direction of each glider immediately after the collision. b. (ii) Show numerically that the total kinetic energy of the two-glider system is the same before and after the collision. c. (iii) Determine the percentage of the initial kinetic energy that is transferred to the second glider.Intuitive explanation
This is a collision problem where you need to use conservation of momentum and kinetic energy simultaneously. The key insight is that "perfectly elastic" means both total momentum and total kinetic energy are conserved—giving you two equations to solve for two unknown final velocities. Set up the momentum equation first, then use the energy equation to find how the motion is redistributed between the gliders after impact.
Intuitive explanation
This is a collision problem where you need to use conservation of momentum and kinetic energy simultaneously. The key insight is that "perfectly elastic" means both total momentum and total kinetic energy are conserved—giving you two equations to solve for two unknown final velocities. Set up the momentum equation first, then use the energy equation to find how the motion is redistributed between the gliders after impact.