Question

A child of mass 40kg running on a horizontal surface with velocity 5m/s jumps on a stationary skating bard of mass 3kg while running.calculate the velocity of the combined system of child and the skating board​

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 : P

i

=P

f

Or M

girl

u

girl

+M

cart

u

cart

=(M

girl

+M

cart

)V

Or 40×5+3×0=(40+3)V

⟹ V=

43

200

m/s

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Answer 2

Explanation:

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