After a hold up, Robin Banks flees in his 1575 kg getaway car at 20 m/s. He crashes into a 45 kg highway barrel which is at rest

Question

2 years ago

7

. If Robin Bank’s car moves at 18.9 m/s after the collision, how fast does the barrel move after being hit?

2 answers:

fiasKO [112] · Answer 1 · 2022-07-17T18:55:39+03:00

7 0

Answer:

v = 38.9 m/s

Explanation:

Dimas [21] · Answer 2 · 2022-07-17T21:18:59+03:00

Dimas [21]2 years ago

6 0

v = 38.5 m/s

Explanation:

P1 = P2 (conservation law of linear momentum)

(1575 kg)(20 m/s) + (45 m/s)(0) = (1575 kg)(18.9 m/s) + 45v

Solving for v

v = 38.5 m/s