A. 1800J
B. 1600J
C. 600J
D. 440J
Correct Answer: Option B
B. 1600J
Explanation
Potential energy at the highest point = mgh
PE = 4 × 10 × 40 = 1600J
![A load of mass 120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms‾²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A load of mass 120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms‾²]")
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