https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_en.html

Part (2):m1 m2

1) KEEP: Elasticity at 100%

2) Select: m₁ = 3 kg and m₂ = 1.5 kg

3) Position 1 (-1.00m) and position 2 (0.00m)

4) Select: v_1i=1.00m/s and v_2i=0.5m/s

5) Click on Play, then after the collision click on Pause.

6) Record the values of v_1f and v_2f.

7) Calculate the values of p_i , p_f, p_f/p_i , K_i , K_fand K_f/K_i and record them in tables 2 & 3.

Table 2

V1i (m/s)	V2i (m/s)	V1f (m/s)	V2f (m/s)	pi = m1v1i + m2v2i (kg.m/s)	pf = m1v1f + m2v2f (kg.m/s)	pf/pi
1.00	0.50
1.50	0.75
2.00	1.00
2.50	1.25

Table 3

V1i (m/s)	V2i (m/s)	V1f (m/s)	V2f (m/s)	Ki = (0.5m1v1i2) + (0.5m2v2i2) (J)	Kf = (0.5m1v1f2) + (0.5m2v2f2) (J)	Kf/Ki
1.00	0.50
1.50	0.75
2.00	1.00
2.50	1.25

Do they all have the same p_f/ p_i? explain.

Do they all have the same K_f / K_i? explain.

Questions:

1. What is the difference between elastic and inelastic collisions?

1. Discuss the difference you saw when (m₁=m₂) and when (m₁ m₂).

1. Move the elasticity slide to 0% (completely inelastic). Run a sample simulation and see what changes and what does not. Describe the motion after collision. Do a quick calculation of momentum and kinetic energy before and after collision. Is momentum still conserved? Is K? 

 

Answer rating: 100% (QA)

1 Difference between elastic and inelastic collisions Elastic Collision In an elastic ... View the full answer