In the first case, the force acting on the spring is the weight of the mass:

This force causes a stretching of

on the spring, so we can use these data to find the spring constant:

In the second case, the first mass is replaced with a second mass, whose weight is

And since we know the spring constant, we can calculate the new elongation of the spring:
Good afternoon.
We have:

The function of velocity:

For
t = 5 s:
Answer:heat brings it up then down
Explanation: