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

2. 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

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

4. 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

5. 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

6. 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

7. 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!