Question

A boy of mass 30 kg jumps with a horizontal velocity of 3 m s' onto a 3
stationary cart with frictionless wheels. The mass of the cart is 5 kg. What is
his velocity as the cart starts moving? Assume that there is no external
unbalanced force working in the horizontal direction.​

Answer 1

Answer:

Given : M girl =40 kg u girl =5 m/s

M cart =3 kg

Initial velocity of cart u cart =0

Let the final velocity of cart be V.

Applying conservation of linear momentum :

Pi =Pf

Or Mgirl ugirl +Mcart ucart=

(MMgir +MMcar )V

Or 40×5+3×0=(40+3)V

⟹ V= 200/43 m/s

Explanation:

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