InterviewSolution
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InterviewSolution
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A car falls off an edge and drops to the ground in 0.5 s. i) What is its speed on striking the ground?ii) What is the average speed during the 0.5 s? iii) What is the height of the edge from the ground? |
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Answer» i) t = 0.5 s, u = 0, v = ? ,a = +g = 10 m/s2 . v = u +at = 0 + 10 x 0.5 = 5 m/s ii) Average speed = (u + v)/2 = (0 + 5 )/ 2 = 2.5 m/s. iii) Distance travelled s = 1/2 gt2 = 1/2 x 10 x 0.52 =1/2 x 10 x 0.25 = 1.25 m. |
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