<p> Collisions with Interactive Physics</p><p>Objective: To learn about conservation of momentum by watching different types of collisions between objects and measuring their momenta before and after collision.</p><p>Activity A: Elastic Collision 2</p><p>1. a) open Interactive Physics 2000 b) under File, Open, open “Physics Experiments” –> “Collision” –>“Elastic 2”</p><p>2. Run the experiment, observing the motion of the two balls as they move along. Stop the experiment after the gliders collide.</p><p>3. Use the ‘tape player’ controls at the bottom to move through the experiment before and after the collision. Complete the table below.</p><p>NOTE: To see exact numbers for the velocities (instead of estimating from the graphs) do this: a) click on the ball b) go to Measure (at top of screen); then Velocity, highlight All – repeat for other ball</p><p>Mass of Velocity Momentum Mass of Velocity Momentum Total A of A of A B of B of B momentum (A + B) (kg) (m/s) (kg m/s) (kg) (m/s) (kg m/s) (kg m/s) Before Collision</p><p>After Collision</p><p>4. Describe the motion of the balls as they move along. Describe the velocities of the balls before and after the collision.</p><p>5. Do you think momentum was conserved in this activity? Explain your answer.</p><p>6. Why is it especially important to take the vector (amount & direction) nature of momentum into account for this activity? Collisions with Interactive Physics</p><p>Activity B: Inelastic Collision 2</p><p>1. Close “Elastic 2”, and open “Inelastic 2” (from the same folder)</p><p>2. Run the experiment, observing the motion of the two balls as they move along. Stop the experiment after the gliders collide.</p><p>3. Use the ‘tape player’ controls at the bottom to move through the experiment before and after the collision. Complete the table below.</p><p>NOTE: To see exact numbers for the velocities (instead of estimating from the graphs) do this: a) click on the ball b) go to Measure (at top of screen); then Velocity, highlight All – repeat for other ball</p><p>Mass of Velocity Momentum Mass of Velocity Momentum Total A of A of A B of B of B momentum (A + B) (kg) (m/s) (kg m/s) (kg) (m/s) (kg m/s) (kg m/s) Before Collision</p><p>After Mass (A+B) Velocity (A+B) Collision</p><p>4. Describe the motion of the balls as they move along. Describe the velocities of the balls before and after the collision.</p><p>5. Do you think momentum was conserved in this activity? Explain your answer.</p><p>6. Why is it especially important to take the vector (amount & direction) nature of momentum into account for this activity?</p>