A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collisi

Question

2 years ago

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A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collisi

on the green train moves with a speed of 3 m/s. What is the final momentum of the blue and green train combined?
A. 90 kgm/s
B. 110 kgm/s
C. 50 kgm/s
D. 200 kgm/s

Physics

2 answers:

Komok [63] · Answer 1 · 2022-05-05T02:08:40+03:00

Komok [63]2 years ago

8 0

Answer:

D. 200 kgm/s

Explanation:

Momentum is conserved.

Initial momentum = final momentum

(50 kg) (4 m/s) + (30 kg) (0 m/s) = final momentum

200 kgm/s = final momentum

irina1246 [14] · Answer 2 · 2022-05-05T03:57:07+03:00

Answer:

D. 200 kgm/s

Explanation:

A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collision the green train moves with a speed of 3 m/s. Therefore, the final momentum of the blue and green train combined is 200 kgm/s.