STANDARD Physics Equations of Motion MCQ Question
An auto travelling along a straight road increases its speed from 30.0 m s⁻¹ to 50.0 m s⁻¹ in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?
6.0 s
4.5 s
3.6 s
7.0 s
Correct Answer
Detailed Explanation
Using the equation v² = u² + 2as, we find the acceleration a = 40/9 m s⁻². Then, using the equation s = ut + 1/2 at², we solve for t using the quadratic formula, yielding t = 4.5 s.
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