In exercises of unit 1, problem 1B-2 question b, it says "Find the time at which the height of the ball is at its maximum height".

I understand that b/32 should be substituted for t in the following formula: s = bt - 16t². However, I don't get the result which is b²/64. Can someone please explain how to arrive at this answer? Thanks.

Question

In exercises of unit 1, problem 1B-2 question b, it says "Find the time at which the height of the ball is at its maximum height".

I understand that b/32 should be substituted for t in the following formula: s = bt - 16t². However, I don't get the result which is b²/64. Can someone please explain how to arrive at this answer? Thanks.

anonymous · Answer

You seem to be on the right track; maybe you should check your work, or maybe I don't understand your question.

anonymous · Answer

Thanks for your reply. My question is that eventhough I know that the final answer should be b²/64, I don't understand why I didn't get that answer.

anonymous · Answer

Yesss finaly! I got it. It was a stupid mistake of mine :)

anonymous · Answer

Well done!