WAEC - Physics (2013 - No. 8)
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
Paliwanag
V = u - gt
u = v + gt
= 0 + 10 x 1.2
= 12ms\(^{-1}\)
u = v + gt
= 0 + 10 x 1.2
= 12ms\(^{-1}\)