Analyzing Two-Dimensional Collisions Purpose: to study conservation of momentum and kinetic energy in a two-dimensional collision. Hypothesis/Prediction: Predict what happens to the total momentum and the total kinetic energy in a collision that is: - head-on. - almost head-on. - almost a miss. Materials: PhET Collision Lab (Pick Explore 2D): https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_en.htmlProcedure: 1. Select Explore 2D and set it up as shown below. Make sure that you check the correct boxes. 2. Set the initial values for: a. mass of both balls to 1.00 kg. b. y position of both balls to 0.00 m. c. initial x position of blue ball to -1.50 m. d. initial x position of red ball to 0.00 m. e. initial velocity of blue ball to 0.70 m/s. 3. Pause the simulation before either ball reaches an edge, and record their velocities after the collision. 4. Reset and change the y position of the blue ball a little for an almost head-on collision. 5. Run the simulation again, pause the simulation before either ball reaches an edge, and record their velocities after the collision. 6. Reset and change the y position of the blue ball so that it almost misses the red ball. 7. Run the simulation again, pause before either ball reaches an edge and record their velocities after the collision. Note: please put calculations steps in each empty cell in the table provided

Observations: Blue Ball Red Ball Before Collision After Collision Before Collision After Collision m (kg) Vx (m/s Vy (m/s) Vx' (m/s) Vy' (m/s) Vx (m/s) Vy (m/s) Vx' (m/s) Vy' (m/s) 1.00 0.70 1.00 0.70 0 0 0 1.00 0.70 Momentum Calculations: Blue Ball Red Ball Total Before Collision After Collision Before Collision After Collision Before After Collision Collision m (kg) ( kg . m/s ) Py ( kg . m/s) (kg . m/s) ( kg . m/s ) ( kg .m/s ) Py ( kg . m/s) ( kg . m/s) Py' PT ( kg . m/s) (kg . m/s) PT ( kg . m/s) 1.0 1.0 0 1.00 0 Kinetic Energy Calculations: m v Blue Ball v Red Ball v' Blue Ball (kg) (m/s) (m/s) Ex () Red Ball (m/s) (m/s) E' () 1.00 0.70 1.00 0.70 1.00 0.70