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Selina Solutions Class 9 Physics Solutions for Exercise 2C in Chapter 2 - Chapter 2 Motion In One Dimension

Question 16 Exercise 2C

A body moves from rest with uniform acceleration and travels 270m in 3s. Find the velocity of the body at 10s after the start.

Answer:

Given: u=0m/s; s=270m; t=3s;

We know that;

S = ut + ½ at.t

Substituting values;

270 = 0 + (1/2)a(3 x 3)

270 = 9/2a

a = 60 m/s^2

after time = 10s, velocity is

v = u + at

= 0 + 60 x 10 = 600m/s

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