Question

Help please

Answer 1

For harmonic motion equation
D=9cos((pi/2)t) the frequency would be (pi/2) / 2pi

Answer 2

Frequency = cycles/unit of time

Answer 3

So its (pi/2)/2pi?

Answer 4

Yes but that can simplify.

Answer 5

How?

Answer 6

(Pi/2)/(2pi) is the same as (pi/2) * (1/2pi) which equals?

Answer 7

2.4674011002723397

Answer 8

\[\frac{ \frac{\pi}{2} }{ 2\pi } = \frac{ \pi }{ 2 } * \frac{ 1 }{ 2\pi }\]
because the reciprocal of 2pi is 1/2pi
so the answer is \[\frac{ \Pi }{ 4\pi }\]

Answer 9

pi cancels and you are left with?

Answer 10

4

Answer 11

No, you would have 1/4 wouldn't you?

Answer 12

oh yeah

Answer 13

So it's saying 1 cycle per 4 units of time and that's your frequency.

Answer 14

ok, thank you