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Solved: A tow truck pulls a car 5.00 km along a horizontal
Chapter 6, Problem 6.2(choose chapter or problem)
A tow truck pulls a car 5.00 km along a horizontal roadway using a cable having a tension of 850 N.
(a) How much work does the cable do on the car if it pulls horizontally? If it pulls at \(35.0^{\circ}\) above the horizontal?
(b) How much work does the cable do on the tow truck in both cases of part (a)?
(c) How much work does gravity do on the car in part (a)?
Questions & Answers
QUESTION:
A tow truck pulls a car 5.00 km along a horizontal roadway using a cable having a tension of 850 N.
(a) How much work does the cable do on the car if it pulls horizontally? If it pulls at \(35.0^{\circ}\) above the horizontal?
(b) How much work does the cable do on the tow truck in both cases of part (a)?
(c) How much work does gravity do on the car in part (a)?
ANSWER:
Step 1 of 4
a) Work done, W = F . S = FS cos
If the truck pulls the car horizontally, the direction of motion and direction of force will be same.
Hence, = 0°
Therefore, W = FS cos 0 = FS (cos 0 = 1)
F = 850 N, S = 5 km = 5000 m
W = 850 N × 5000 m = 4250000 J = 4250 kJ