Question

A body of mass 1000 kg is moving horizontally with a velocity 50 m/s. A mass of 250 kg is added. Find the final velocity:

• A. 40 m/s
• B. 20 m/s
• C. $30\sqrt{2}$m/s
• D. 50 m/s

Answer 1

Answer: (A)

40 m/s

Answer 2

From momentum conservation

(1000) (50) = 1250 v

v = 40 m/s