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