a body is projected horizonatlly from the top of a cliff 45m above the ground. if the body lands at a distance 30m from the foot of the cliff, calculate the speed of projection. [g = 10ms-2]
- 10ms-1
- 15ms-1
- 20ms-1
-
30ms-1
The correct answer is: D
Explanation
V2 = U2 + 2gh= 02 + 2 x 10 x 45 = 30