Two springs are in a series combination and are attached to a block of mass 'm' which is in equilibrium. Spring constants:k and k’ Extensions:x and x’ respectively. Find the force exerted by spring on the block?
The equivalent stiffness (
Now, the total extension in the equivalent spring
hence, the force (
The most importat thing to understand here is that the force
This then leads to 2 very simple expressions for "the force exerted by spring on the block":
#F = kx#
#F = k'x'#