1. The problem statement, all variables and given/known data 1. A simple pendulum of length L is attached to a cart that slides without friction down a plane inclined at angle theta with the horizontal. Find the period of oscillation of the pendulum on the sliding cart. 2. A clock with a pendulum keeps perfect time on earth's surface. In which case will the error be greater: if the clock is placed in a mine of depth h or if the clock is elevated to a height h ? Assume that h<< Radius of earth. 2. Relevant equations T=2pi sqrt(L/g) 3. The attempt at a solution 1. So I guess T will not be just normal as 2pi*sqrt(L/g). How does the incline affect the period ? what do I have to calculate ? 2. How should I attack this problem ? I mean does it have to do with gravitational force ??