Ill. Inelastic Collisions A. Setup: 1. Get a second cart. face each other. 2. Pl

Question

Ill. Inelastic Collisions A. Setup: 1. Get a second cart. face each other. 2. Place the carts the track so that the Velcro again setting 3. Place another motion detector at the other end of the track, once the switch to the picture of the cart. 4. Connect the motion detectors to Dig/Sonic 1 and 2. vs time graph. 5. Make sure you can read them on LoggerPro on a velocity expression for velocity 6. Flip one of your velocities to be negative by changing the in "column options." B. Measurements: 1. Record the mass of each cart mass1 mass, 4125 2. Collide the trying to give them the same speed in opposite directions. (Make sure they stick together after collision so this is an inelastic collision.) 3. Using the velocity vs time graphs, record the velocity of each cart before and after the collision. V2i D. 20 m ls 4. Add a mass bar to one of the carts and repeat steps 1 through 3. vnls mass 1 mass2 5. Add a second mass bar to one of the carts and repeat steps 1 through 3. mass1 17s mass2

Explanation / Answer

C. Anaysis :

1. Momentum is conserved .

Case 1 -

m1v1i+ m2v2i = pi

(0.4989 kg)(0.2434m/s) + (0.4975 kg)(-0.3488 m/s) = pi

Pi = - 0.052 kg m/s

Case 2 -

m1v1i + m2v2i= Pi

(0.9976)(0.5803)+(0.4975)(-0.31967) = pi

Pi= 0.42 kg m/s

Case 3 -

m1v1i + m2v2i= pi

(1.2968 )(0.0989)+(0.4975)(-0.4037)= -0.0726 kgm/s

2.

Pf= (m1+m2)vf

Remember pi= pf [ conservation of momentum] if it doesn't come out , change your reading accordingly.

You can find vf as :

Pi= (m1+m2)vf for all three cases.

Hope it helps.

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