An object is dropped from the top of a tower If... - WAEC Physics 2012 Question
An object is dropped from the top of a tower. If it takes 4s for it to reach the ground, calculate the height of the tower.(g = 10 ms-2, ignore air resistance)
A
20m
B
40m
C
80m
D
160m
correct option: c
H = \(\frac{1}{2} gt^2\)
\(\frac{1}{2} \times 10 \times 4^2 = 80\)
\(\frac{1}{2} \times 10 \times 4^2 = 80\)
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