a ball is droped from a height 20 m. Given that it rebounce with a velocity of (3/4) that which it hit the ground find the time interval between the first and second rebounce.


Question and Answers Forum

All Questions Topic List
Mechanics Questions
Previous in All Question Next in All Question
Previous in Mechanics Next in Mechanics
Question Number 86479 by Rio Michael last updated on 28/Mar/20

$a ball is droped from a height 20 m . Given that it$ $rebounce with a velocity of \frac{3}{4} that which it hit the ground$ $find the time interval between the first and second rebounce .$
	Answered by mr W last updated on 29/Mar/20

	$t h e h e i g h t a f t e r a r e b o u n c e i s {(\frac{3}{4})}^{2} o f$ $t h e h e i g h t b e f o r e t h e r e b o u n c e .$ $h_{0} = 20 m$ $h_{1} = {(\frac{3}{4})}^{2} 20 = 11.25 m$ $b e t w e e n t h e f i r s t a n d s e c o n d r e b o u n c e$ $t h e b a l l r e a c h e s a h e i g h t o f 11.25 m$ $a n d f a l l s d o w n a g a i n . t h e t i m e n e e d e d$ $i s t_{1} = 2 \sqrt{\frac{2 h_{1}}{g}} = 2 \sqrt{\frac{2 \times 11.25}{10}} = 3 s e c$
	Commented by Rio Michael last updated on 29/Mar/20

	$t h a n k s s i r$
Terms of Service
Privacy Policy
Contact: info@tinkutara.com

Question and Answers Forum