Question

Please see the attachment!

Answer 1

For the first one, take the derivative of the equation and find out the time when the velocity is .8 m/sec. This can be plugged into the height equation to get the height at that point. The second one will also use the velocity equation found by taking the derivative but 0 will be used instead.

Answer 2

@Kevonni Hi, I got the right answer, just wanted to confirm that I was doing it corectly, thank you!
If I wanted to calculate the max. velocity of the wave, how would that work?

Answer 3

You take the derivative of the velocity, which gives acceleration. The same optomization method is used.

Answer 4

Is that the correct way then @Kevonni?

Answer 5

Yes!