When are the displacement and acceleration equal to zero for the motion of a mass on a spring? a. at maximum displacement b. at minimum displacement c. at the equilibrium position d. at a displacement of 2x e. at a displacement of 1/3x

As we know that when object is connected to spring then the motion is to and from about the mean position

Then the acceleration is given as

here we know that

= angular frequency

now if the displacement from mean position is zero then we will have x =0

and hence the acceleration must be zero

so we will say that acceleration and displacement both are zero when object is at equilibrium position

So correct answer will be

C. at the equilibrium position

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

measuring things 1 litre of water