A. 200J
B. 400J
C. 800J
D. 1600J
Correct Answer: Option B
B. 400J
Explanation
K.E = ½Mv²=12×2×20² = 400J
![A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if starting from rest; the mass acquires a velocity of 4ms‾¹ in 8s [g = 10ms−²2]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if starting from rest; the mass acquires a velocity of 4ms‾¹ in 8s [g = 10ms−²2]")
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