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
- 1.2ms-1
- 6.0ms-1
-
12.0ms-1
- 0.6ms-1
The correct answer is: C
Explanation
V = u - gt
u = v + gt
= 0 + 10 x 1.2
= 12ms\(^{-1}\)