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...
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
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Here the by the work done by the volunteers the potential energy of pumpkin is increased.
Therefore;
Work done = Increase in potential energy of the pumpkin
`= 500*9.81*1.02`
`= 5003.1 J`
Power = Work/time
`= 5003.1/3.3`
`= 1516.1 J/s`
So the work done by the volunteers is 5003.1 J with a power of 1516.1 J/s
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work = force to lift up and distance covered , it is a positive work done because direction and force are in the same direction
W= Fd
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..
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