how much work is done by a crane that lowers 1000N of material 150m?
To calculate the work done by a crane that lowers a load, you can use the formula:
Work = Force x Distance
Given:
Force (F) = 1000 N
Distance (d) = 150 m
To find the work done, substitute the given values into the formula:
Work = 1000 N x 150 m
Now, to get the final answer, multiply the force by the distance:
Work = 150,000 N·m (or Joules)
Therefore, the work done by the crane when lowering 1000 N of material over a distance of 150 m is 150,000 N·m (or Joules).
well the force is up but the motion is down so our answer will be negative.
- 150,000 Joules
That means that the weight does positive work on the crane. We could use that if we were smart to run a generator connected to the crane cable to charge the battery on the crane.
Regenerative braking systems on electric and hybrid vehicles work this way. Instead of forcing a plate agains the turning wheel to slow down, the axle turns a generator which chrges a battery. The torque to turn the generator slows the axle, and therefore the vehicle, down.