Hello can someone please explain quesiton 4 in the 2003 paper for me please? I don't actually have the quesiton in front of me but i'll be able to ge tit on monday. If anyone can tell me beforehand that would be great.

Thanks

Ian

## SHM

### Jason Bourne

Posted 14 May 2006 - 06:21 PM

4. (a) Force exerted by spring = force due to gravity on mass.

Hence

(b) (i) Use Hookes Law to find the spring constant k(in N/m) from

where y is the initial extension 40mm. The UNBALANCED force is then calculated from

where y is the second extension 30mm.

(ii) hence

hence hence

Hence

(b) (i) Use Hookes Law to find the spring constant k(in N/m) from

where y is the initial extension 40mm. The UNBALANCED force is then calculated from

where y is the second extension 30mm.

(ii) hence

hence hence