Answer:
x=0.02 m
Step-by-step explanation:
Given that
Mass , m = 40 g ( 1 kg = 1000 g)
m = 0.04 kg
K= 20 N/m
We know that spring force ,F is given as
F= k x
x=Stretching in the spring
At equilibrium position
m g= K x
(take g= 10 m/s²)
x=0.02 m
Therefore the extension in the spring will be 0.02 m.