Question

Question 57:
A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together ?

Lakhmir Singh Physics Class 9

Answer 1

Answer:

no

Explanation:

the truck of mass 1500 kg moves in its direction and the truck of mass 500kg move along the truck which had higher mass

Answer 2

Dear Student,

◆ Answer -

v = 2.5 m/s

● Explanation -

By law of conservation of momentum,

Initial momentum = Final momentum

m1u1 + m2u2 = (m1+m2)v

500×4 + 1500×2 = (500+1500)v

2000 + 3000 = 2000v

v = 5000/2000

v = 2.5 m/s

Therefore, common velocity of the masses is 2.5 m/s.

Thanks dear. Hope I was helpful..