A. speed
B. velocity
C. acceleration
D. retardation
Correct Answer: Option D
D. retardation
![A body is projected vertically upwards with a speed of 10 ms‾¹ from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms‾²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A body is projected vertically upwards with a speed of 10 ms‾¹ from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms‾²]")
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