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Impulse and collision help

  • Thread starter cary5
  • Start date
  • #1
26
0
1. A car of mass 1500 kg traveling at 20 m/s hits a parked car of mass 2000
kg. The two cars stick together.
a. Find the velocity of the cars after the collision
b. Determine the impulse

i know that the momentom befor the collition is 30,000 how can i use that to find the Vf
 

Answers and Replies

  • #2
39
0


use conservation of momentum to find the final velocity.

total initial momentum = total final momentum
 
  • #3
26
0


use conservation of momentum to find the final velocity.

total initial momentum = total final momentum
ok so hier is wat i did
Pbefor=Pafte
30,000=3500*Vf
8.57=Vf

and since the change in p is the same befor and after then the change in p would be 0 and therefor the impuls would be 0

m i rite?
 
  • #4
39
0


thats right
 

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