I. Given are some interesting information involving work, power and energy. Use what you know to solve the unknown quantities by simply filling up the blank. Right in the heart of China, the Macau Tower, Macau is the highest commercial bungee jump in the world with a maximum length of 233 m during stretch. When the bungee cord (rope) is unstretch, its length is 180m. If a man weighing 500 N, dropped from the top of Macau tower, moved vertically down, and reach the maximum length of 233m before the cord compressing up, what then is the (a) force constant of the bungee cord, and (b) what is the stopping power of the bungee cord? (assume that air resistance and mass of the bungee cord are negligible) Given: total length Weight of man3 m*g 500N,g 9.8 m/s² m = 233 m, un-stretch length = 180m, Ay= %3D Required: Force constant = ?, stopping power of Bungee cord = ? Solution: Solve for vr before the cord stretches: AGPE =mgh = AKE = 0.5m 2 = 2gh = 2*(9.8m/s2)*(180m) Solve for net acceleration due to the cord and earth's gravity; ahet= (u-v²)/(2Ay) Initial vis the final velocity before it stretches, while the new final V= 0 ahet = -33.3m/s? , Fnet = m*anet = Solve for time elapsed to fully stretch the bungee cord; At = ( (het) = Solve for the stopping power of the bungee cord: AW = 0.5k*Ay² , Pstop =AW/At AW = 0.5k*Ay2= V =V= Fnet = -k*Ay, k = -Fnet/Ay = %3D %3D Pstop =AW/At =
Kinematics
A machine is a device that accepts energy in some available form and utilizes it to do a type of work. Energy, work, or power has to be transferred from one mechanical part to another to run a machine. While the transfer of energy between two machine parts, those two parts experience a relative motion with each other. Studying such relative motions is termed kinematics.
Kinetic Energy and Work-Energy Theorem
In physics, work is the product of the net force in direction of the displacement and the magnitude of this displacement or it can also be defined as the energy transfer of an object when it is moved for a distance due to the forces acting on it in the direction of displacement and perpendicular to the displacement which is called the normal force. Energy is the capacity of any object doing work. The SI unit of work is joule and energy is Joule. This principle follows the second law of Newton's law of motion where the net force causes the acceleration of an object. The force of gravity which is downward force and the normal force acting on an object which is perpendicular to the object are equal in magnitude but opposite to the direction, so while determining the net force, these two components cancel out. The net force is the horizontal component of the force and in our explanation, we consider everything as frictionless surface since friction should also be calculated while called the work-energy component of the object. The two most basics of energy classification are potential energy and kinetic energy. There are various kinds of kinetic energy like chemical, mechanical, thermal, nuclear, electrical, radiant energy, and so on. The work is done when there is a change in energy and it mainly depends on the application of force and movement of the object. Let us say how much work is needed to lift a 5kg ball 5m high. Work is mathematically represented as Force ×Displacement. So it will be 5kg times the gravitational constant on earth and the distance moved by the object. Wnet=Fnet times Displacement.
hello, please solve for the blanks.
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