IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: wassup on July 18, 2010, 10:45:14 am

Title: SHM
Post by: wassup on July 18, 2010, 10:45:14 am: Q. A simple pendulum of length 1 m swing with s.h.m. through a semi vertical angle of 5°. If the mass of the pendulum bob is 15 g.
Calculate:
(i) its period of oscillation
(ii) the amplitude of the oscillation
(iii) the maximum acceleration of the bob
Title: Re: SHM
Post by: Saladin on July 18, 2010, 11:38:06 am: Is this CIE or Edexcel and is this AS or A2?
Title: Re: SHM
Post by: nid404 on July 18, 2010, 03:47:25 pm: Quote from: wassup on July 18, 2010, 10:45:14 am
Q. A simple pendulum of length 1 m swing with s.h.m. through a semi vertical angle of 5°. If the mass of the pendulum bob is 15 g.
Calculate:
(i) its period of oscillation
(ii) the amplitude of the oscillation
(iii) the maximum acceleration of the bob

From the little knowledge of SHM that I have...

i) w(omega)= $\sqrt(g/L)$
= $\sqrt(10/1)$

T= 2 $\pi$ / w = 2 $\pi$ / $\sqrt(10/1)$
=1.99s
ii)
sin $\theta$ = -x/L
x(max amp)= 0.96 m

iii)max accn = -w²A(amplitude)
= - ( $\sqrt(g/L)$ )² X 0.96
=-10X 0.96
=-9.6ms^-2
Title: Re: SHM
Post by: astarmathsandphysics on July 19, 2010, 10:10:37 am: I will make some shm pages
Title: Re: SHM
Post by: wassup on July 19, 2010, 01:12:19 pm: Quote from: Engraved on July 18, 2010, 11:38:06 am
Is this CIE or Edexcel and is this AS or A2?
This is A2, but i donno if this is from CIE or Edexcel.

thank u very much Xena :)

thanks astar, will w8 for ur notes.
Title: Re: SHM
Post by: nid404 on July 19, 2010, 03:14:42 pm: Welcome :)
Title: Re: SHM
Post by: Saladin on July 19, 2010, 04:21:25 pm: Quote from: wassup on July 19, 2010, 01:12:19 pm
This is A2, but i donno if this is from CIE or Edexcel.

thank u very much Xena :)

thanks astar, will w8 for ur notes.

Thanks mate, I was feeling so bad, I thought it was AS, and I was so embarrassed not being able to answer it.... :-[
Title: Re: SHM
Post by: nid404 on July 19, 2010, 05:50:18 pm: lol dude, when do you start with A2?
Title: Re: SHM
Post by: Saladin on July 19, 2010, 05:51:10 pm: After I get my results! iA.