1. A barge of mass 5.00 10⁴ kg is pulled along the Erie Canal by two mules, walking along towpaths parallel to the canal on either side of it. The ropes harnessed to the mules make angles of 45.0 to the canal. Each mule is pulling on its rope with a force of 1.20 kN. How much work is done on the barge by both of these mules together as they pull the barge 175.0 m along the canal?

____________________ kJ

2.

A crate of mass my = 13.80 kg is pulled by a massless rope up a 36.9 ramp. The rope passes over an ideal pulley and is attached to a hanging crate of mass my = 16.30 kg. The crates move 1.32 m, starting from rest. m1 Find the work done by gravity on the sliding crate