Passage VIII A disc of mass m and radius R is attached with a spring of force contant k at its center as shown in figure. At x-0, spring is unstretched. The disc is moved to x=A and then released. There is no slipping between disc and ground. Let f be the force of friction on the disc from the ground.
f versus t (time) graph will be as
A.
B.
C.
D.
