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PHYSICS CH 2 Motion — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9SciencePHYSICS CH 2 Motion2 Marks
Question
Exercise Problem.

A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?

✓

Answer

Given: acceleration = 4ms– 2.
time = 10s and initial velocity = 0
Formula: s = ut + 1/2 at2
Solution:
distance covered s = 0 × t + 1/2 × 4 ms– 2 × (10 s)2.
s = 1/2 × 4 ms– 2 × 100 s2
= 1/2 × 400m
= 200m

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