An-arrow-is-projected-straight-upwards-at-a-speed-of-100m-s-With-what-speed-will-it-return-to-the-ground-if-air-resistance-is-ignored-

Question Number 29464 by NECx last updated on 09/Feb/18

A n a r r o w i s p r o j e c t e d s t r a i g h t

u p w a r d s a t a s p e e d o f 100 m / s .

W i t h w h a t s p e e d w i l l i t r e t u r n t o

t h e g r o u n d i f a i r r e s i s t a n c e i s

i g n o r e d ?

Answered by mrW2 last updated on 09/Feb/18

t h e a r r o w h a s t h e s a m e k i n e t i c e n e r g y

w h e n i t r e t u r n s t o t h e s t a r t i n g p o i n t,

i . e . i t h a s t h e s a m e s p e e d a s i t l e f t

t h a t p o i n t .

\Rightarrow v = 100 m / s

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