Sunday

January 25, 2015

January 25, 2015

Posted by **Jason** on Tuesday, November 20, 2012 at 1:41pm.

- physics -
**Damon**, Tuesday, November 20, 2012 at 2:03pmF = -k x = m a

if x = a sin 2 pi f t

v = 2 pi f a cos 2 pi f t

a = - (2 pi f)^2 a sin 2 pi f t

so

a= -(2 pi f)^2 x

then

-k x = -m (2 pi f)^2 x

(2 pi f)^2 = k/m

here T = 1/f = 1 so f = 1/1 = 1 Hz

(2 pi)^2 = 120/m

m = 30/( pi^2) = 3.04 kg

**Answer this Question**

**Related Questions**

Physics - You wish to make a mass on a spring oscillate with a period of 1.00 ...

physics - A 4.5-kg block is hung from a spring causing the spring to elongate 12...

Physics - A spring, (spring constant of 400 N/m) is displaced .75 m from its ...

PHYSICS - a 0.1 kg mass is suspended at rest from a spring near the Earth's ...

physics - a 0.1 kg mass is suspended at rest from a spring near the Earth's ...

physics - If a 0.1 kg mass is suspended at rest from a spring near the Earth's ...

physics - a 0.75 kg mass attached to avertical spring streches the spring 0.30m...

physics - 1. a 2 kg body is attatched to a spring of negligible mass and ...

Physics - A student gets a 2.9 kg mass to oscillate up and down on bottom of a ...

Physics Help! - A 2.2 kg mass is attached to a spring with a force constant of ...