Lessons

Eamcet Physics
1 st Year : Unit 3.1( Laws of Motion ) - Laws of Motion

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Q.

A 50kg man is standing at one end of a 25m long boat. He starts running towards the other end. On reaching the other end his velocity is 2ms–1. If the mass of the boat is 200 kg, final velocity of the boat is (in ms–1)

View Answer

Correct choice: A

Explanation:

m1v1 + (m1+m2) v2 = 0, v2 = m1v1 / (m1+m2)
v2 = 50 (2) / (50 + 200) = 2/5 ms–1
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