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

 

 

 

Expert Answers
jeew-m eNotes educator| Certified Educator

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

akshaygoel96 | Student

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..