Question

What is the magnitude of a force that is required to keep a spring with a spring constant 205 N/m compressed 0.4 m from its starting point?

Answer 1

By Hooke's law we have that the magnitude of the force exerted by a pricng is given by:

$F=kx$

where k is the spring constant and x is the length of extension or compression, then we have:

$F=205\cdot0.4=82$

Therefore the force is 82 N