chain 67 meters long whose mass is 28 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 5 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared. Your answer must include the correct units. Work =

A motorist runs out of gas on a level road 210 m from a gas station. The driver pushes the 1,120 kg car to the gas station. If a 180 N force is required to keep the car moving, how much work (in J) does the driver do?

A man pushes a lawn mower on a level lawn with a force of 185 N. If 48% of the force is directed horizontally, how much work is done by the man in pushing the mower 5.9 m?

A chain is held on a frictionless table with one fourth hanging over the edge.  If the chain has a length of 57 cm and a mass of 0.020 kg, how much work is required to pull the hanging part back onto the table.  Use g = 10 N/kg.

A heavy rope, 50 ft long, weighs 0.3 lb/ft and hangs over the edge of a building 140 ft high. (a) How much work W is done in pulling the rope to the top of the building? W = ft-lb (b) How much work W is done in pulling half the rope to the top of the building? W = ft-lb

An object is moved on a horizontal surface by a force of 15 N up to a distance of 10 m. The force of kinetic friction is 7.5 N. What is the work done by the resultant force?

=V.V.) A stone with a mass of 4.00 kg is moving with velocity (6.20î - 1.40ĵ) m/s. (HINT: v² = v (a) What is the stone's kinetic energy (in J) at this velocity? J (b) Find the net work (in J) on the stone if its velocity changes to (8.001 + 4.00ĵ) m/s. J

How much potential energy does a person of mass 82kg have if they are standing at the top of a building that is 59.6 m high? sumbit your answer is exponential form.

An infinitely long, flat cliff has stones (to be treated as point masses) hanging off it spaced 1 metre apart starting at position n = 1. The stone at position n has masses 1 4n kg and is attached to a 2n m long wire with negligible weight. The first three stones are drawn in Figure 2. How much work is required to pull up all the stones to the top of the cliff? Assume work is measured in newton-meters. If you need to use the acceleration due to gravity constant g, leave it as-is. DO NOT approximate g by a numerical value. 1 2 3 →n FIGURE 2. Point masses hanging off a cliff.

You and your friend Gandalf are mowing lawns for extra spending money. Gandalf pushes his mower 25 m and applies a force of 150 N. If you apply a force of 60 N, how far must you push your mower so that the work you do equal Gandalf’s?