A flatbed truck on a horizontal road is loaded with a block whose mass M = 900 kg. Initially the block is at a distance x = 1 m from the back end of the truck bed. The kinetic and static friction coefficients between the block and the flatbed of the truck are µk = 0.30 and µs = 0.32, respectively. The block is not tied down; it is held in place by the frictional force. The truck accelerates uniformly from rest to vf = 108 km/h in t = 12 seconds. What is the work done on the block by the friction force between the block and the flatbed of the truck?

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Chapter1: Units, Trigonometry. And Vectors
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A flatbed truck on a horizontal road is loaded with a block whose mass M = 900 kg. Initially the block is at a distance
x = 1 m from the back end of the truck bed. The kinetic and static friction coefficients between the block and the
flatbed of the truck are uk
0.30 and µs
0.32, respectively. The block is not tied down; it is held in place by the
frictional force. The truck accelerates uniformly from rest to vf = 108 km/h in t = 12 seconds. What is the work
done on the block by the friction force between the block and the flatbed of the truck?
(Take g
10 m/s? .)
405 kJ
375 kJ
270 kJ
320 kJ
490 kJ
Transcribed Image Text:A flatbed truck on a horizontal road is loaded with a block whose mass M = 900 kg. Initially the block is at a distance x = 1 m from the back end of the truck bed. The kinetic and static friction coefficients between the block and the flatbed of the truck are uk 0.30 and µs 0.32, respectively. The block is not tied down; it is held in place by the frictional force. The truck accelerates uniformly from rest to vf = 108 km/h in t = 12 seconds. What is the work done on the block by the friction force between the block and the flatbed of the truck? (Take g 10 m/s? .) 405 kJ 375 kJ 270 kJ 320 kJ 490 kJ
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