Sorry I need so much help, my tutor is done for the semester

[Kris1120]

Homework Statement

A spring is hung from the ceiling. A 0.483-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.176 m before momentarily coming to rest. (a) What is the spring constant of the spring? (b) Find the angular frequency of the block's vibrations.

Homework Equations

(a) F = kx
(b) omega = sq rt(k/m)

The Attempt at a Solution

(a) k = mg/x
= (0.483 kg)(9.81 m/s) / 0.176 m
= 26.8943 N/m

(b) sq rt( 26.8943 N/m / 0.4383 kg) = 7.83329 rad/s

 

[cryptoguy]

well your logic looks right, i did the calculation for part a and got 26.92, not sure if that's where your mistake is...

 

[tiny-tim]

A spring is hung from the ceiling. A 0.483-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.176 m before momentarily coming to rest.
…
(a) F = kx

Hi Kris1120!

Nooo …

The acceleration is not zero, is it?

Use conservation of energy.

 

[cryptoguy]

oooohhhh yeaaaa... i forget a lot after 2 months of no physics... acceleration is at a max when the block is momentarily not moving