Tuesday

September 30, 2014

September 30, 2014

Posted by **Andrea** on Wednesday, January 30, 2008 at 6:14pm.

Find the following for when t=0, T/4, T/2, 3T/4, and T:

displacement

speed

restoring force (F=kx)

acceleration (a=F/m)

kinetic energy (1/2mv^2)

potential energy (1/2kx^2)

For t=0s I got: .2m, 0m/s, .4N, .8m/s^2, 0J, and .04J respectively. I got this first by finding the spring constant using this equation: T= 2*pi*(sqrt(m/k)) Thus k= roughly 2

Is this correct? Then I have trouble figuring out the rest because t= T/4 confuses me and I can't find the displacement at this particular time.

- Physics -
**bobpursley**, Wednesday, January 30, 2008 at 7:21pmYou have the wrong equation...

Displacement=20cos wt where

w=2PI *f=2PI/T= 2

displacement= 20 cos 2t

Now calculate displacement as a function of t.

**Answer this Question**

**Related Questions**

Physics Urgent please help - Consider an ideal spring that has an unstretched ...

physics - Consider an ideal spring that has an unstretched length l0 = 3.9 m. ...

Physics - Consider an ideal spring that has an unstretched length l0 = 3.9 m. ...

physics - Consider an ideal spring that has an unstretched length l0 = 3.9 m. ...

Physics - Consider an ideal spring that has an unstretched length l0 = 3.3 m. ...

physics - A block with a mass of 0.5kg is pushed against a horizontal spring of ...

physics - A 4.10 kg object on a horizontal frictionless surface is attached to a...

physics - A physics student pulls a block of mass m = 23 kg up an incline at a ...

physics - A horizontal spring has a spring constant k = 23.2 N/m. A 0.165 kg ...

Physics - A spring is mounted horizontally. A crate which has a mass of 8.5kg is...