A car is moving along a straight road level when the driver see a boy crossing the road 1.5m when the driver immediately applies the brakes which produces constant retardation in the first second. After applying the brakes the car travels 25m and in the next second it traveles 15m. i) find the retardation in m/s^2 ii) show that the car comes to rest at the point where it started


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Question Number 156395 by alcohol last updated on 10/Oct/21

$A c a r i s m o v i n g a l o n g a s t r a i g h t r o a d l e v e l w h e n$ $t h e d r i v e r s e e a b o y c r o s s i n g t h e r o a d 1.5 m w h e n t h e d r i v e r$ $i m m e d i a t e l y a p p l i e s t h e b r a k e s w h i c h p r o d u c e s$ $c o n s t a n t r e t a r d a t i o n i n t h e f i r s t s e c o n d . A f t e r a p p l y i n g t h e b r a k e s$ $t h e c a r t r a v e l s 25 m a n d i n t h e n e x t s e c o n d i t$ $t r a v e l e s 15 m .$ $i) f i n d t h e r e t a r d a t i o n i n m / s^{2}$ $i i) s h o w t h a t t h e c a r c o m e s t o r e s t a t$ $t h e p o i n t w h e r e i t s t a r t e d$
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