First slide

Position Path Length (Distance) And Displacement

Question

The distance travelled by a body falling from rest in the first, second and third seconds are in the ratio

Easy

A

1:2:3
B

1:3:5
C

1:4:9
D

none of the above

Solution

Given that u = 0, hence
$s_{n} = \frac{a}{2} (2 n - 1)$
$∴ s_{1} = \frac{a}{2}, s_{2} = \frac{3 a}{2} and s_{3} = \frac{5 a}{2}$
Or s₁:s₂:s₃ =1:3:5

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