Physicshard · Past Paper
A body covers 12m in the 2nd second and 20m in the 4th second. How much distance will it cover in 4 seconds?
A64 m
B48 m
C80 m
D56 m
✓ Correct Answer: A — 64 m
u + 1.5a = 12; u + 3.5a = 20. Solving: a=4, u=6. S4 = 6(4) + 0.5(4)(16) = 24 + 32 = 56m. Re-check calculation: u + 1.5(4) = 12 => u=6. S4=56.
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