You are in an inertial frame. Suppose you know the function x(t) describing the displacement of a body of mass m as a function of time. Can you find the force acting on the body, as a function of time?

Answers

No, not enough information provided.

Yes, just differentiate x(t) twice with respect to t.

Yes, just differentiate x(t) twice with respect to t, and multiply by m.

Yes, just differentiate x(t) twice with respect to t, and divide by m.

none of the above