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InterviewSolution
| 1. |
Show that vu -2as by calculus method: |
| Answer» <p>a = dv/dt</p><p>a = (dv/ds)(ds/dt)</p><p>a = v (dv/ds)</p><p>∫ a ds = ∫ v dv</p><p>as = ½ v² + constant</p><p>v = u at s = 0</p><p>a * 0 = ½ u² + constant</p><p>constant = -½ u²</p><p>as = ½ v² - ½ u²</p><p>2as = v² - u²v²=u²+2as</p> | |