Question

A wooden block performs SHM on a frictionaless surface with frequency, `v_0`. The block carries a charge +Q on its surface. If now a uniform electric field `vecE` is switched-on as shown, then the SHM of the block will be

A. of the same frequency and with shifted mean position
B. of the same frequency and with the same mean position
C. of changed frequency and with shifted mean position
D. of changed frequency and with the same mean position

Answer 1

The frequency will be the same `v=sqrt(k//m)//2pi`. Frequency is independent of any external constant. But due to the constant foce `q//E` toward right, the equilibrium position gets shifted by `qE//K` in forward direction.