Question

15. Ishan weighing 50 kg runs along the rails with a
velocity of 6.75 km h' and jumps into a trolley of
mass 0.25 quintal, standing on the rails. The velocity with which the trolley starts moving along the rails,is
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Answer 1

Explanation:

Given Ishan weighing 50 kg runs along the rails with a  velocity of 6.75 km h' and jumps into a trolley of  mass 0.25 quintal, standing on the rails. The velocity with which the trolley starts moving along the rails,is

Given m1 = 50 kg, v1 = 6.75 km / h  = 6.75 x 1000 / 60 x 60 m/s = 1.875 m/s

      Also m2 = 1 quintal = 100 kg, 0.25 quintal = 25 kg, v2 = 0, v = ?

We know that the principle of conservation of linear momentum we get  

(m1 + m2) v = m1v1 + m2v2 = m1v1

So v = m1v1 / m1 + m2

So v = 50 x 1.875 / 50 + 25

So v = 1.25 m/s

Link for reference

https://brainly.in/question/581385