Posted by **Claire** on Friday, August 6, 2010 at 9:35pm.

8. Write the equation for simple harmonic motion given that the amplitude is 5 centimeters and the frequency is 2/ ð cycles per second. Assume that the maximum displacement occurs when t = 0.

a. y = 5sin4t

b. y = 5cos2t

c. y = 5cos4t

d. y = 5sin2t

9. Write the equation for simple harmonic motion given that the amplitude is 4 centimeters and the period is ð seconds. Assume zero displacement at t = 0.

a. y = 4cos2ðt

b. y = 4sin2ðt

c. y = 4cos2t

d. y = 4sin2t

*How would go about solving these? Need Help.

- trig -
**bobpursley**, Friday, August 6, 2010 at 11:51pm
amplitude is pretty simple, that is the coefficent in front of the sin/cos term.

If it starts at zero amlitude at zero time, then it has to be sine

If it is maximum amplitude at zero time, it has to be cosine. Think out that.

Now the period. the standard format of the trig arguement is (2PI*frequency*time) I dont see PI in any of the answers, so I really dont understand.

on 8, with what I have given you, it has to be cosine, and the argument in the cosine term is 2PI*frequency*t

in 9, it has to be sine, with the argument 2PI*frequency*time.

## Answer This Question

## Related Questions

- trig - Write an equation for simple harmonic motion, given that the amplitude ...
- Physics - A diving board oscillates with simple harmonic motion of frequency 4.6...
- Physics: Simple Harmonic Motion - A 10kg particle undergoes simple harmonic ...
- Physics - The position of a body moving in simple harmonic motion is given by m ...
- simple harmonic motion - a simple harmonic motion is represented by x=4sin[3t+3....
- simple harmonic motion - A 50-g mass is attached to a spring and undergoes ...
- PHYSICS HELP Harmonic Motion - A 32.0 kg block at rest on a horizontal ...
- PHYsics !! - a) What do you understand by Simple Harmonic Motion? b) A simple ...
- Physics - A 10kg particle undergoes simple harmonic motion with an amplitude of ...
- physics - A 10 g particle undergoes Simple Harmonic Motion with an amplitude of ...

More Related Questions