1.

In the question number of 93, what is the velocity of a monkey running on the roof of the train A against its motion with a velocity of 18 km h^(-1) with repect to the train A as observed by a man standing on the ground?

Answer»

`5 m s^(-1)`
`10 m s^(-1)`
`15 m s^(-1)`
`20 m s^(-1)`

Solution :Let the velocity of the MONKEY with respect to ground be `v_MG`. RELATIVE velocity of the monkey with respect to TRAIN A,
`v_(MA) = -18 km h^(-1) = -18 xx 5/18 m s^(-1) = -5 m s^(-1)`
`v_(MG) = v_(MA) + v_(AG) = -5 m s^(-1) + 15 m s^(-1) = 10 m s^(-1)`


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