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A car moving with a velocity of 10 ms and with a uniform acceleration gains a velocity of30 ms after travelling a distance of 4 km.The time taken is |
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Answer» t=0.5sExplanation:USE KINEMATIC EQUATIONS, v^2-u^2=2as v=ginal velocityu=intial velocitya=accelerations=displacement so, 30×30-10×10=2×a×4 a=100ms^2 now use v=u+at FORMULA 30=10+100t 30-10=100t20=100tt=0.5s |
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