Collision Lab
http://phet.colorado.edu/en/simulation/collision-lab
Open up the advanced tab, and have a look around:
- select "More Data"
- Check "show vectors"
- experiment with the elasticity
1D motion: Direct Central Impact 13.13
1.
check "reflecting border"
set the initial positions and velocities to:
Particle 1: m1 = 0.5 kg, (x, y) = (0.119, 0) ; Vx = 1m/s, Vy = 0
Particle 2: m2 = 2.0 kg, (x, y) = (1.5, 0): Vx = 0, Vy = 0
Calculate the particle velocities after the collision, then play the simulation and check your answers.
2. Set the initial positions and velocities to:
Particle 1: m1 = 0.1 kg, (x, y) = (1.5,0) ; Vx = 0m/s, Vy = 0
Particle 2: m2 = 2.0 kg, (x, y) = (0.189,0): Vx = 1 m/s, Vy = 0
Calculate the particle velocities after the collision, then play the simulation and check your answers.
3. Repeat #1 and #2 with elasticity set to 50%.
4. Create an excel table that calculates the velocities after collision given the elasticity, and the initial velocities and masses.
5. 4. Repeat #1 and #2 with elasticity set to 0.
6. Create another excel table that calculates the velocities after collision in the case where e = 0.
13.14 Oblique Central Impact
Change simulation to 2D
7. Start with an elasticity of 0%
Particle 1: m1 = 0.5 kg, (x,y) = (0.119, -0.24), (Vx, Vy) = (1, 1)
Particle 2: m2 = 2 kg, (x,y) = (3.011, -0.761), (Vx, Vy) = (-1, 1)
Calculate the particle velocities after the collision, then play the simulation and check your answers.
8. Repeat #7 with an elasticity of 50%.
9. Repeat #7 with an elasticity of 100%.
10. Create an excel worksheet that calculates final velocities if 0.1<e<100%.
11. For elasticity = 1.0
Start with:
Particle 1: m1 = 1.0 kg, (x,y) = (0.15, -0.8), (Vx, Vy) = (?, ?)
Particle 2: m2 = 1.0 kg, (x,y) = (1.0, 0.25), (Vx, Vy) = (0,0)
What initial particle velocity is needed for particle #1 to knock #2 into the upper right hand corner?
Concept quiz:
http://scienceres-edcp-educ.sites.olt.ubc.ca/files/2015/01/sec_phys_momentum_collisions_centerofmass.pdf
