Experiment 5 Conservation of Momentum Experimental Goals n

Experiment 5 Conservation of Momentum

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

Overview 1. 1. Conservation of Momentum in two cart collisions 2. Verification of Newton’s Third Law 3. Momentum and Impulse for two cart Collision

Part 1. 3 tests of Conservation of Momentum velocity Using sonar to find velocities of the carts before and after collision you can verify conservation of momentum. Before collision right 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 demonstration: Push two carts together and apply varying force between them. F Cart A Cart B t

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

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