A. 1.08 x 10^11J
B. 5.20 x 10^11J
C. 1.08 x 10^12J
D. 2.50 x 10^13J
Correct Answer: Option C
C. 1.08 x 10^12J
Explanation
using the formula:
E = Mec²
![A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1.2s. [g = 10ms‾²]. Calculate the speed of projection](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1.2s. [g = 10ms‾²]. Calculate the speed of projection")
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