When is the magnitude of the acceleration of a mass on a spring at its maximum value?

Question

anonymous · Answer

$$F = kx = ma$$
$x$ is extension (or compression) from the relaxed position, $k$ is the spring constant, $a$ is acceleration.
$$a = \frac{kx}{m}$$
$k$ and $m$ cannot change, so when is $|a|$ maximum?

anonymous · Answer

When the mass is moving upward?!

anonymous · Answer

during kinetic energy cycle, and compression combine

anonymous · Answer

A. when the mass has a speed of zero 
B. when the mass is moving upward 
C. when the mass has no displacement
D. when the mass is (1/2)x

anonymous · Answer

A. 

when kinetic energy cycles with compression they form to because non moving and thats when gravity takes them up to a higher peek toil they reach zero

anonymous · Answer

could you choose more that one ? because it could also be D

anonymous · Answer

haha nooo:( just one answer

anonymous · Answer

LOL. i asked because i had the same question before and it said choose all that apply and the answers were A. and D but I know A. for sure :)

anonymous · Answer

Ill go ahead with A:) Thanks for your help again

anonymous · Answer

When $x$ is maximum (it's at the top or bottom of the oscillation amplitude), the speed is zero.