A. 100 m
B. 50m
C. 32 m
D. 18 m
Correct Answer:
Option D = 18 m
Explanation
From S = ut + ½at²
S = ½at², since U = 0
Let S5 = distance in 5 seconds
= ½ x 4 x 5² = 2 x 25 = 50m
S4 = distance covered in 4 seconds
= ½ x 4 x 4² = 2 x 16 = 32m
Distance covered in the fifth second
S5 – S4 = 50m – 32m = 18m
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