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Anastasy [175]
3 years ago
15

A 1120 kg car traveling initially with a speed of 27.40 m/s in an easterly direction crashes into the back of a 9 490 kg truck m

oving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east. (a) What is the velocity of the truck right after the collision?
Physics
1 answer:
asambeis [7]3 years ago
8 0

Answer:

41.5 m/s

Explanation:

Since there are no external forces, momentum must be conserved.

Momentum P = mv.

Total momentum before the collision:

P = m_{car}v_{car} + m_{tru}_{ck}v_{tru}_{ck} = 1120 * 27.4 + 490 * 20 = 40.488

Total momentum after the collision:

P = 1120 * 18 + 490 * v_{tru}_{ck} = 40.488

solving for v:

v_{truck} = 41.5

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