A. 200J
B. 400J
C. 800J
D. 1600J
Correct Answer: Option B
B. 400J
Explanation
K.E = ½Mv²=12×2×20² = 400J
![A bullet fired vertically upwards reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet. [g = 10ms‾²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A bullet fired vertically upwards reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet. [g = 10ms‾²]")
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