Answer:
C. 0.05 J
Step-by-step explanation:
Given that
Spring constant ,K= 10 N/m
Distance ,x = 0.1 m
The amplitude ,A= 0.1 m
The stored energy potential energy in the spring

Now by putting the values

U=0.05 J
Now From energy conservation
The maximum kinetic energy = The Maximum potential energy
KE= U
KE= 0.05 J
Therefore the answer will be C.
C. 0.05 J