A block is suspended from a spring. The spring is stretched. 2 meters. If the spring constant is 200 newtons per meters, what is the weight of the block?

The spring force = kx = mg.

k is spring constant = 200 N/m

x is the spring elongation = 0.2 m

F = 200*0.2 = 40 N

Now, F = mg wil be the weight of the object

Thus, weight is 40 N.

Thus, now we can also find the mass of object, m = F/g = 40 N/9.8

Because g is acceleration due to gravity = 9.8 m/sec ^2

m = 4.08 kg