Question

A crane lifts a 450 kg beam 12 m straight up at a constant velocity. Calculate the mechanical work done
by the crane.

Answer 1

To calculate the mechanical work done by the crane, we need to use the formula:

Work = Force x Distance

In this case, the force would be equal to the weight of the beam, which is given by the equation:

Force = Mass x Gravity

where mass is 450 kg and gravity is approximately 9.8 m/s^2.

Force = 450 kg x 9.8 m/s^2 = 4410 N

The distance the beam is lifted is given as 12 m.

Work = Force x Distance = 4410 N x 12 m = 52920 N·m

Therefore, the mechanical work done by the crane is 52920 N·m.