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Figure 7-42 shows a cold package of hot dogs sliding
Chapter , Problem 53(choose chapter or problem)
Figure 7-42 shows a cold package of hot dogs sliding rightward across a frictionless floor through a distance d ! 20.0 cm while three forces act on the package. Two of them are horizontal and have the magnitudes F1 ! 5.00 N and F2 ! 1.00 N; the third is angled down by u ! 60.0( and has the magnitude F3 ! 4.00 N. (a) For the 20.0 cm displacement, what is the net work done on the package by the three applied forces, the gravitational force on the package, and the normal force on the package? (b) If the package has a mass of 2.0 kg and an initial kinetic energy of 0, what is its speed at the end of the displacement?
Questions & Answers
QUESTION:
Figure 7-42 shows a cold package of hot dogs sliding rightward across a frictionless floor through a distance d ! 20.0 cm while three forces act on the package. Two of them are horizontal and have the magnitudes F1 ! 5.00 N and F2 ! 1.00 N; the third is angled down by u ! 60.0( and has the magnitude F3 ! 4.00 N. (a) For the 20.0 cm displacement, what is the net work done on the package by the three applied forces, the gravitational force on the package, and the normal force on the package? (b) If the package has a mass of 2.0 kg and an initial kinetic energy of 0, what is its speed at the end of the displacement?
ANSWER:Step 1 of 3 a) The work done on the package by the force is given by, Here the angle between the force and the distance, The magnitude of force, The distance slipped by the hotdog, So, The work done on the package by the force is given by, Here the angle between the force and the distance, The magnitude of force, The distance slipped by the hotdog, So,\n The work done on the package by the force is given by, Here the angle between the force and the distance, The magnitude of force, The distance slipped by the hotdog, So,