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two cars weighing 1500 kg are made to collide with wall.the initial and final velocities of the car are - 15.0 m/s & 2.6m/s respectively. If the collision lasts for 0.15 s, then find impulsive force exerted on the car. |
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Answer» FORCE = mass × Acceleration Acceleration = CHANGE in speed ÷ change in time Change in speed is : 2.6 - 15 = - 12.4m/s t = 0.15 a = 12.4/0.15 = - 82.67m/s² The negative sign indicates that car DECELERATES. F = 1500 × 82.67 = 24005 N |
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