Question

If an 800 kg sports car slows to 13 m/s to check out an accident scene and the 1200 kg pick-up truck behind him continues traveling at 25 m/s.

Answer 1

Answer:20.2 m/s

Step-by-step explanation:

M1 = 800kg

M2 = 1200kg

V1 = 13m/s

V2 = 25m/s

U (common velocity) =?

M1V1 + M2V2 = (M1 + M2). U

(800*13) + (1200*25) = (800+1200) * U

10400 + 30000 = 2000u

40400 = 2000u

U = 40400 / 2000

U = 20.2 m/s