Posted by **Dan** on Sunday, February 6, 2011 at 4:25pm.

A particle of mass m = 0.40 kg oscillates on the end of a spring with an amplitude of 0.30 m. At t = 0, it's at it's equilibrium position (x=0) and is moving in the positive x-direction. At 0.20 s later it is at x = 0.25 m.

a. What is the lowest possible value for the spring constant?

b. What is the second lowest possible value for the spring constant?

- Physics -
**Damon**, Sunday, February 6, 2011 at 4:58pm
if 0 at 0 and v+ then

x = .3 sin 2 pi f t

.25 = .3 sin 2 pi f(.2)

.8333 = sin 2 pi f(.2)

so

2 pi f(.2) = sin^-1 .8333 = 56.4 deg = .985 radians

so

2 pi f = 4.92 radians/second

but

w = sqrt(k/m) = 2 pi f

so

k/m = (4.92)^2

k = .4 (4.92)^2

the next one will be at twice the frequency so it makes a second trip in that time

2 pi f = w = 9.84 radians /second

- Physics -
**Dan**, Sunday, February 6, 2011 at 5:58pm
Thanks, I wasn't able to get the second part of the answer (got a spring constant of 24.21 N/m) correct though.

- Physics -
**Dan**, Sunday, February 6, 2011 at 6:35pm
For the second part, since this is a sine function, there's a particular angle that would have the same value as 0.8333. Like sin(0 deg) and sin(180 deg) equals to 0. So I did 180 - 56.4 to get that particular angle. Once I got that, I converted it to radians and repeated the steps you provided after that. Thanks for the help Damon.

## Answer this Question

## Related Questions

- Physics 3 - A particle of mass m = 0.35 kg is oscillating on the end of a spring...
- Physics - A particle hangs from a spring and oscillates with a period of 0.2 s....
- physics - a 0.25 kg mass at the end of a spring oscillates 2.2 times per second ...
- physics - A mass of 2 kg is hung from the lower end of a vertical spring and ...
- trig - A spring is attached to the ceiling and pulled 17 cm down from ...
- Physics - A mass m = 1.50 kg oscillates on an ideal,massless horizontal spring ...
- Physics - Please show how you got the answers, not just the answers. A 40.0 N ...
- physics - A particle vibrates in Simple Harmonic Motion with amplitude. What ...
- AP PHYSICS - A .35 kg ladle sliding on a horizontal frictionless surface is ...
- science - a particle 100g attach with a horizontal spring moving s.h.m.with ...

More Related Questions