Question

A load of mass 120kg is raised vertically through a height of 2m by a machine whose rear is loaded. Calculate the power of the machine (g = 10 m/s²).

A. 2400 W
B. 1800 W
C. 3600 W
D. 1200 W

Answer 1

The power of the machine is 2400 W.

Step-by-step explanation:

To calculate the power of the machine, we need to use the formula P = mgh/t, where P is power, m is mass, g is acceleration due to gravity, h is height, and t is time.

In this case, the mass is 120 kg, acceleration due to gravity is 10 m/s², height is 2 m, and we need to assume the time it takes to raise the load is 1 second for simplicity.

Substituting the values into the formula, we get P = (120 kg)(10 m/s²)(2 m) / 1 s = 2400 W.

Therefore, the power of the machine is 2400 W, which corresponds to option A.