A flat-topped toy cart moves on frictionless wheels, pulled by a rope under tension t. The mass of the cart is m1. A load of mass m2 rests on top of the cart with the coefficient of static friction s between the cart and the load. The cart is pulled up a ramp that is inclined at angle theta above the horizontal. The rope is parallel to the ramp. What is the maximum tension t that can be applied without causing the load to slip? (use any variable or symbol stated above along with the following as necessary: g. ).