Question:
If a car at rest accelerates uniformly to a speed of 144 km/hour in 20 second it covers a distance of
If a car at rest accelerates uniformly to a speed of 144 km/hour in 20 second it covers a distance of
Updated On: Aug 20, 2024
- 400 m
- 1440 m
- 2880m
- 25m
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The Correct Option is A
Solution and Explanation
u = 0, v = 144 km/hour $ = 144 \times \frac{5}{18} m/ \sec$
$ = 40 / m / \sec$
$v = u + at$
$\Rightarrow \, a = \frac{v - u}{t} = \frac{40 - 0 }{20} = 2 m / \sec^2$
$\therefore \, s = ut + \frac{1}{2} at^2$
$ = \frac{1}{2} \times 2 \times (20)^2 = 400 m $
$ = 40 / m / \sec$
$v = u + at$
$\Rightarrow \, a = \frac{v - u}{t} = \frac{40 - 0 }{20} = 2 m / \sec^2$
$\therefore \, s = ut + \frac{1}{2} at^2$
$ = \frac{1}{2} \times 2 \times (20)^2 = 400 m $
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