A car starts from rest and accelerates uniformly at 5m/s². What will be its velocity after 4 seconds?
This question is about applying the first equation of motion to find the velocity of an object starting from rest under constant acceleration.
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The first equation of motion is v = u + at. Here, u = 0, a = 5m/s² and t = 4s. Substituting these values:
v = 0 + 5 × 4 = 20 m/s.
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