Motion in A Straight Line

Question: A body projected vertically upwards with a velocity \[u\] returns to the starting point in 4 seconds. If \[g = 10\]m/sec2, the value of \[u\] is



1) 5 m/sec
2) 10 m/sec
3) 15 m/sec
4) 20 m/sec
Solution: Explanation: Explanation
Motion under Gravity

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