A particle P is projected from a point O at the edge of a cliff 60m from the sea with a velocity of 30ms^(−1) . When P is at a point B where OB is a horizontal, another particle Qsuch that P and Q hit the sea simultaneously at thesame point A. Gven that they strike the sea 6seconds after P was fired ^� calculate a) the sine of the angle of elevation of projection. b) the distance from A to O. c) the time of flight of Q. d) the Range . (take g = 10ms^(−2) ) please help


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Question Number 71198 by Rio Michael last updated on 13/Oct/19

$A p a r t i c l e P i s p r o j e c t e d f r o m a p o i n t O a t t h e e d g e o f a c l i f f 60 m$ $f r o m t h e s e a w i t h a v e l o c i t y o f 30 {m s}^{- 1} . W h e n P i s a t a p o i n t B$ $w h e r e O B i s a h o r i z o n t a l, a n o t h e r p a r t i c l e Q s u c h t h a t$ $P a n d Q h i t t h e s e a s i m u l t a n e o u s l y a t t h e s a m e p o i n t A . G v e n t h a t t h e y$ $s t r i k e t h e s e a 6 s e c o n d s a f t e r P w a s f i r e d \bar{} c a l c u l a t e$ $a) t h e s i n e o f t h e a n g l e o f e l e v a t i o n o f p r o j e c t i o n .$ $b) t h e d i s t a n c e f r o m A t o O .$ $c) t h e t i m e o f f l i g h t o f Q .$ $d) t h e R a n g e .$ $(t a k e g = 10 {m s}^{- 2})$ $p l e a s e h e l p$
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