A. 20m
B. 40m
C. 80m
D. 160m
Correct Answer: Option C
C. 80m
Explanation
H = ½gt²
½×10×4²=80
![A carpenter on top of a roof of 20.0m high dropped a hammer of mass 1.5kg and it fell directly to the ground. the kinetic energy of the hammer just before hitting the ground is? [g = 10 ms−²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A carpenter on top of a roof of 20.0m high dropped a hammer of mass 1.5kg and it fell directly to the ground. the kinetic energy of the hammer just before hitting the ground is? [g = 10 ms−²]")
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