A 5.0x10^2 kg pumpkin is raised from the ground to a truck platform, a distance of 1.02m. It takes a group of volunteers 3.3s to lift the pumpkin onto the platform. Calculate the work and power required to lift the pumpkin
Here the by the work done by the volunteers the potential energy of pumpkin is increased.
Work done = Increase in potential energy of the pumpkin
`= 5003.1 J`
Power = Work/time
`= 1516.1 J/s`
So the work done by the volunteers is 5003.1 J with a power of 1516.1 J/s
work = force to lift up and distance covered , it is a positive work done because direction and force are in the same direction
w = mgd(so you are lifting up , thats why F = mg
w = 5.0* 10^2 * 9.8 * 1.02 = + 4998kgm^2/s^2(donot forget to show positive sign)
power is = (WORK DONE)/ TIME = 1514.5454 m^2 kg/s^3
SO SIMPLEY PLUG THE VALUE OF WORK ABOVE WE DONE , AND ALSO WE have given the time
Good luck , just check out for calculation , may be i did mistake in calculating work, further question . feel free to ask me..