goes eith original question

Physics
Tutor: None Selected Time limit: 1 Day

Jun 22nd, 2015

Thank you for the opportunity to help you with your question!

Velocity in vertical direction = 17sin72 =16.1679 m/sec.

When ball reaches maximum height, velocity in vertical direction becomes zero. 

Using v = u-gt, we get   0 = 16.1679 - 9.8t

Or, t = 16.1679/9.8 = 1.649, say, 1.65secs

Hence, ball reach maximum height in 1.65 secs.       Ans. 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 22nd, 2015

Kindly forward follow up questions here. I will reply. 

Jun 22nd, 2015

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