A tow truck pulls a car 5.65 km alonga horizontal roadway using a cable having a

Question

A tow truck pulls a car 5.65 km alonga horizontal roadway using a cable having a tension of 865 N.
(a) How much work does the cable do on the carif it pulls horizontally?

How much work does the cable do on the car if it pulls at34.5° above the horizontal?

(b) How much work does the cable do on the tow truck if it pullsthe car horizontally?

How much work does the cable do on the tow truck if it pulls thecar at 34.5° above thehorizontal?

(c) How much work does gravity do on the car in part (a) if itspulled horizontally?

How much work does gravity do on the car in part (a) of its pulledat an angle of 34.5°?
(a) How much work does the cable do on the carif it pulls horizontally?

How much work does the cable do on the car if it pulls at34.5° above the horizontal?

(b) How much work does the cable do on the tow truck if it pullsthe car horizontally?

How much work does the cable do on the tow truck if it pulls thecar at 34.5° above thehorizontal?

(c) How much work does gravity do on the car in part (a) if itspulled horizontally?

How much work does gravity do on the car in part (a) of its pulledat an angle of 34.5°?

Explanation / Answer

a) = 0 work done W=F.S = 865N * 5.65*1000m*cos0 =4887250J b) = 34.5 work done W=F.S = 865N * 5.65*1000m*cos(34.5)= 4027710J the work done by the gravity is zero for both cases

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