(c) What is the speed of the pendulum at the bottom of the swing (0 degrees)? (d) Does the force of tension do any work as the pendulum swings? Explain why. 45° v = 0 v = ?
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- 1) A child pulls on a wagon with a force of 75 N. If the wagon moves a total of 42 m in 3.1 minutes, what is the average power delivered by the child?[9.] A 6.0 kg package in an Amazon sorting room slides 3.0 m down a plane inclined 60 degrees below the horizontal. The coefficient of kinetic friction between the package and the plane is µ = 0.35. Calculate the work done on the package by (a) friction; (b) gravity; (c) the normal force. If the package starts with velocity v = 2.0 m/s, what is its final velocity?How much work can a 1950 Watt motor do in 15 min? Express your answer in Joules.
- '1. A 40KG box initially at rest is pushed for 5.0m along a rough horizontal floor by a constant horizontally applied force of 130 N. If the coefficient of frietion between the box and the floor is 0.30, find; a) the work done by the applied force, b) the energy lost due to friction, c) the change in kinetic energy of the box, d) the final speed of the box.1-) A box with a mass of 10 kg is pulled along a roughly inclined plane at an initial speed of 1.5 m / s. The pulling force is 100 N parallel to the inclined plane at an angle of 20 ° to the horizontal. If the kinetic coefficient of friction is 0.4 and the case is pulled to a distance of 5 m, (a) How much work is done against gravity? (b) How much work is being done against friction? (c) How much work does a 100 N force do? (d) What is the change in the kinetic energy of the chest? (e) What is the speed of the crate after 5 m has been towed? (sin20 ° = 0.35 and cos20 ° = 0.94)#1