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 of 10 m `s^(-1)`. The upward speed of the rocket as seen by the stationery observer is nearlyA. 4 m `s^(-1)`B. 6 m `s^(-1)`C. 8 m `s^(-1)`D. 11 m `s^(-1)`

Answer» Correct Answer - D
Observed speed, `v = sqrt((10)^(2) + (6)^(2)) = sqrt(136)`
` = 11 ms^(-1)`


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