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Rain is falling vertically and a man...

Rain is falling vertically and a man is moving with velocity 6m/s find the angle with which umbrella should be held by man to avoid getting wet .

Text Solution

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`vecV_("rain")=-10hatj`
`vecV_("man")=6hatj`
`vecV_(r.w.r.t.man)=-10hatj-6hatj`
`tantheta=6/(10)`
`theta= tan^(-1)(3/5)`
where `theta ` is angle with vertical.
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