Question

12. A ball is thrown up and attains a maximum height of 80m. It's initial speed ___________ m/s ( take g=10m/s² ) ​.


please reply properly and answer with steps ​

Answer 1

Answer:

"Maximum height attained

Maximum height attained H=80 m

Maximum height attained H=80 mInitial speed u=

Maximum height attained H=80 mInitial speed u= 2gH

Maximum height attained H=80 mInitial speed u= 2gH

Maximum height attained H=80 mInitial speed u= 2gH

Maximum height attained H=80 mInitial speed u= 2gH The final speed will be zero because at the highest point it changes its direction.

Maximum height attained H=80 mInitial speed u= 2gH The final speed will be zero because at the highest point it changes its direction.⟹ u=

Maximum height attained H=80 mInitial speed u= 2gH The final speed will be zero because at the highest point it changes its direction.⟹ u= 2×10×80

Maximum height attained H=80 mInitial speed u= 2gH The final speed will be zero because at the highest point it changes its direction.⟹ u= 2×10×80

Maximum height attained H=80 mInitial speed u= 2gH The final speed will be zero because at the highest point it changes its direction.⟹ u= 2×10×80 =40 m/s"

Answer 2

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12. A ball is thrown up and attains a maximum height of 80m. It's initial speed 40 m/s ( take g=10m/s² ) .