A barge of mass 5.0 104 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° to the canal. Each mule is pulling on its rope with a force of 1.0 kN. How much work is done on the barge by both of these mules together as they pull the barge 150 m along the canal?
2007-03-12 08:48:37 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Work is the product of the component of force parallel to the motion, multiplied by the distance covered.
The parallel component of the force exerted by each mule is
Fp = cos(45) * 1000 N = 707 N
Since there are two mules, the work done is
W = 2 * 707 N * 150m = 212 100 N.m = 212 100 J
2007-03-13 02:11:47 · answer #1 · answered by catarthur 6 · 0⤊ 0⤋
Erie Canal Mule
2016-10-06 10:46:45 · answer #2 · answered by ? 4 · 0⤊ 0⤋
The answer is to figure out the f*d, so consider the force in the direction of movement of the barge and multiply by 150
2*cos(45)*1000*150
=212 kJ
j
2007-03-12 11:22:34 · answer #3 · answered by odu83 7 · 1⤊ 0⤋