a body is projected horizonatlly from the top o... - WAEC Physics 2010 Question
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]
A
10ms-1
B
15ms-1
C
20ms-1
D
30ms-1
correct option: d
V2 = U2 + 2gh
= 02 + 2 x 10 x 45 = 30
= 02 + 2 x 10 x 45 = 30
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