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A dog weighing 5kg is standing on a flat...

A dog weighing `5kg` is standing on a flat boat so that it is `10` metres from the shore. It walks `4m` on the boat towards the shore and then halts. The boat weighs `20kg` and one can assume that there is no friction between it and water. The dog from the shore at the end of this time is

A

`3.4` m

B

`6.8`m

C

`12.6`m

D

`10 m `

Text Solution

Verified by Experts

The correct Answer is:
B
`d = (mx)/(m+M) = (5xx4)/(5+20) = 0.8`
` :. ` distance from shore
` = 10 - l+d`
` = 10 - 4 + 0.8 = 6.8 m `
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - I (C.W)
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