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A car starting from rest with acceleration 2m/s². If its final velocity is 20m/s², find its displacement |
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Answer» Explanation:Correct Question,A CAR starting from rest with acceleration 2 m/s².If its final velocity is 20 m/s, FIND its DISPLACEMENT .Solution,Here, we haveInitial velocity of car, u = 0 m/s (As car starts from rest)Final velocity of car, v = 20 m/sAcceleration by car, a = 2 m/s²To Calculate,Displacement by car = ??At, we will find time taken, tAccording to 1st law of motion,we know that,v = u + atSo, putting the values, we get⇒ v = u + at⇒ 20 = 0 + 2 × t⇒ 20 = 2t⇒ 20/2 = t⇒ t = 10 Now, displacement,We know that,Displacement = velocity × time⇒ Displacement = 20 × 10⇒ Displacement = 200 m.Hence, the displacement by car is 200 m. |
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