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-

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