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Acceleration

When we throw...

Question

When we throw a ball downwards from a height the g will be 9.8 ms^-2 or (-9.8ms^-2) ? Give reason

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Solution

$D e a r S t u d e n t, b e c a u s e t h e e a r t h a p p l t t h e g r a v i t a t i o n a l f o r c e a n d t h i s f o r c e g i v e s a c c n t o t h e b o d y i n d o w n w a r d d i r e c t i o n d u e t o f o r c e . t h e v a l u e o f t h i s a c c n f o r a n y b o d y i s 9.8 m / s^{2} k n o w n a s a c c n d u e t o g r a v i t y t h e + - c h o i c e i s t h e s i g n c o n v e n t i o n t h a t y o u u s e t a k e u p w a r d a s + v e t h e n g m u s t b e - v e . i f y o u t a k e a s i g n c o n v e n t i o n t h e n s t i c k t o t h a t R e g a r d s$

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Q. sir,
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