A car loaded with bricks has a total mass of 18kg and is pulled at a constant speed by a rope. the rope is inclined 30 degrees with above the horizontal, and the cart moves 20.0 m on a horizontal surface. The coefficient of kinetic friction between ground and cart is 0.5.
(a) What is the tension on the rope?
(b) How much work is done on the cart by the rope?
(c) What is the energy lost due to friction?
I cant seem to find $t$, the tension.