Two men of masses 40 kg and 20 kg are st...

Two men of masses 40 kg and 20 kg are standing on a boat of mass 100 kg. Length of boat is 20m. Neglect the friction between water and boat. Find the displacement of the boat when both the persons reach at middle of boat.

(a)`5/4 m` , towards right

(b)`5/4 m` , towards left

(c)`5/8 m` , towards right

(d)`5/8 m` , towards left

Text Solution

Verified by Experts

The correct Answer is:

Let the boat is displaced towards right by x.
`implies 100 x + 40 (10 + x) + 20(-10 + x) = 0 implies 160x = -200 implies x = (-5)/4`
i.e. the boat is displaced towards left by 5/4 m.

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