Conservation of Momentum 11/27/2018 Experiment 5 Conservation of Momentum

Experimental Goals Conservation of Linear Momentum Newton's Third Law Equal but opposite forces Impulse Momentum Theorem Compare measured change in momentum to Impulse Conservation of energy in collision: elastic and inelastic collisions

Overview 1. Conservation of Momentum in two cart collisions Verification of Newton’s Third Law 3. Momentum and Impulse for two cart Collision

Stationary medium weight cart collision Moving heavy cart collision Part 1. 3 tests of Conservation of Momentum Before collision Using sonar to find velocities of the carts before and after collision you can verify conservation of momentum. right velocity After collision left time Three tests: Equal mass collision Stationary medium weight cart collision Moving heavy cart collision

Part 3(a). Newton’s third law Newton’s third law demonstration: Push two carts together and apply varying force between them. F t Cart A Cart B

SONAR & Force Probe Data Simultaneously Part 3(b): Impulse-Momentum Theorem SONAR & Force Probe Data Simultaneously Change in Momentum = Impulse Momentum : Mass & Velocity Impulse : Area under the Force vs. Time curve

Conservation of Momentum Collision of two carts (with Force Probes) Summary Conservation of Momentum 3 Trials with different Mass Carts Collision of two carts (with Force Probes) Newton's 3rd Law Momentum conserved (how close?) Any difference from part II? Wires? Impulse (Compare with Dp) … Don’t forget to get velocity data!