Physics
WAEC 1990
An oscillating pendulum has a velocity of 2ms
-1 at the equilibrium position O and velocity at same point P. Using the diagram above, calculate the height of P above O. (Take g = 10ms
2)
-
A.
5.0m
-
B.
2.0m
-
C.
0.4m
-
D.
0.2m
-
E.
0.1m
Correct Answer: Option D
Explanation
Kinetic energy at O = P.E at P 1/2mV = mgh
h = v/2g = 0.2m
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