Lili pulls a 6.00-kg crate across a horizontal floor for a distance of 3.00 m as shown. The tension force in the rope is 86.0 N and the angle is 30.0 with respect to the horizontal. The frictional force on the crate is 12.0 N. Assuming the system is crate+earth+floor, which of the energy term is positive? Select all apply. K + Ug + Usp + Eth + Ech = Wexternal K Ug Usp Eth Ech Wexternal