Calculating SHM Parameters: Speed and Acceleration at Different Points

[KingBigness]

A 2kg body, moving under the influence of a force constant of 3.16N/m, vibrates in SHM with an amplitude of 30mm. Determine the speed and the acceleration,
a) at the midpoint of the vibration (ie. zero displacement)
b) at the end of the path (ie. Max displacement)
c) at a point 20mm from the midpoint


I know that for a) the acceleration will be 0 and for b) the velocity will be 0...but I am not sure how to work out the rest of it...i have many equations that will give me the answer but i need to know omega..which i can not work out.

any help would be greatly appreciated

Thank you!

 

[Doc Al]

i have many equations that will give me the answer but i need to know omega..which i can not work out.

One of the most basic equations describing SHM tells you how to find omega in terms of m and k. (Look it up!)

 

[KingBigness]

One of the most basic equations describing SHM tells you how to find omega in terms of m and k. (Look it up!)

omg I'm a complete spastic...i didn't even register that 'constant force' is k (force constant)

wow i feel completely stupid now.

sorry for wasting your time!