A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s.

What is their final velocity?

A.) - 1.0 m/s

B.) + 2.5 m/s

C.) - 0.25 m/s

D.) + 0.50 m/s

Question

Physics

Yael Mercado

19 April, 15:55

A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s.

What is their final velocity?

A.) - 1.0 m/s

B.) + 2.5 m/s

C.) - 0.25 m/s

D.) + 0.50 m/s

+5

Answers (1)

Know the Answer?

Malakai Hunter · Answer 1

Option B would be right one

according to momentum conservation

6600*2 = 13200kgm/s

5400*3 = 16200kgm/s

16200-13200 = 3000

now 6600-5400 = 1200 kg

thus 3000/1200 = 2.5 v

A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s.What is their final velocity?A.) - 1.0 m/sB.) + 2.5 m/sC.) - 0.25 m/sD.) + 0.50 m/s

A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s.

What is their final velocity?

A.) - 1.0 m/s

B.) + 2.5 m/s

C.) - 0.25 m/s

D.) + 0.50 m/s