Question

A block is attached to a spring and set in motion on a horizontal frictionless surface by pulling the block back a distance 10cm from equilibrium. Now, replace the block with one double the mass and set the block into motion again by pulling the block a distance 10cm from equilibrium and releasing. How will the following new quantities relate to the quanities with the original block? (If it will be larger by a factor of 2, choose double. sqrt stands for square root.)
Maximum Acceleration
Amplitude
Maximum Force of the Spring on the Block
Period of oscillation

Originally I said that amplitude and max force stay the same, maximum acceleration is doubled, and period is sqrt of 2. It told me I'm wrong. Please help!

Answer 1

consider acceleration, it is dependent on force/mass
you doubled mass, then force same, so acceleration is 1/2