Gradebook Print Calculator- d Periodic Table Question 5 of 20 Sapling Learning M

Question

Gradebook Print Calculator- d Periodic Table Question 5 of 20 Sapling Learning Map A cart for hauling ore out of a gold mine has a mass of 433 kg, including its load. The cart runs along a from the horizontal. A donkey, trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 391-N force for a distance of 121 m by means of a rope that is parallel to the ground and makes an angle of 12.5° with the track. The coefficient of friction for the cart's wheels on the track is 0.0151. Use g 9.81 m/s2 Find the work that the donkey performs on the cart during this process. Number 12.5 track Find the work that the force of gravity performs on the cart during the process. Number 29 ° Calculate the work done on the cart during the process by friction. track incline horizontal ground Number O Previous O Check Answer Next 41 Exit

Explanation / Answer

Fd = force applied by donkey = 391 N

d = distance travelled = 121 m

Wd = work done by donkey = Fd d Cos 12.5 = 391 x 121 Cos12.5 = 4.6 x 104 J

Wg = work done by gravity = (mg Sin4.29) d Cos180 = (433 x 9.8 Sin4.29) (121) Cos180 = - 3.8 x 104 J

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