1.

The driver of a car moving towards a rocket launching pad with a speed of 6 m s^(-1) observed that the rocket is moving with speed of10 m s^(-1). The upward speed of the rocket as seen by the stationery observer is nearly

Answer»

4 m `s^(-1)`
6 m `s^(-1)`
8 m `s^(-1)`
11 m `s^(-1)`

Solution :Observed SPEED, `v = sqrt((10)^(2) + (6)^(2)) = sqrt(136)`
` = 11 ms^(-1)`


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