What is the final velocity of the combined bumper cars

A 225 kg red bumper car is moving at 3.0 m/s. It hits a

stationary 180 kg blue bumper car. The red and blue bumper

cars combine and hit a stationary green bumper car of mass

150 kg. The red, blue, and green bumper cars all combine.

0.93 m/s

1.2 m/s

1. Don's

2.7 m/s

Question

Physics

Tomas

3 January, 23:24

What is the final velocity of the combined bumper cars

A 225 kg red bumper car is moving at 3.0 m/s. It hits a

stationary 180 kg blue bumper car. The red and blue bumper

cars combine and hit a stationary green bumper car of mass

150 kg. The red, blue, and green bumper cars all combine.

0.93 m/s

1.2 m/s

1. Don's

2.7 m/s

+3

Answers (1)

Know the Answer?

Kai Robinson · Answer 1

B) 1.2 m/s

Explanation:

Collision 1

Mr Ur + Mb Ub = (Mr+Mb) V

225 * 3 + 0 = (225 + 180) V

V = 675 / 405

1.67 kg. m/s

Collision 2

(Mr+Mb) V + Mg Ug = (Mr+Mb+Mg) V'

675 + 0 = 555 V'

V' = 1.2 m/s