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Step by step explanation.....pls help me |
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Answer» Intial velocity of CAR (U) = 54 km/h = 54 × 5/18 m/s u = 15 m/s Car stops on APPLYING brakes 20m Displacement covered by car (S) = 20m Final velocity of car (v) = 0 Now V² = u² + 2aS = 0 = (15)^2 + 2 × a × 20 = -225 = 40a = a = -5.625 m/s^2 [ negative sign means that ACCELERATION is in OPPOSITE direction of motion of car ] acceleration = 5.625 m/s^2 |
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