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A sprinter in a 100m race accelerates uniformly for the first 35m & then runs with constant velocity. If the sprinter's time for first 35m is 5.4 sec, determine his time for the race.
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written 7.8 years ago by
teamques10
★ 65k
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Given: $s=100m $
$s1=35m$ (distance covered with uniform acceleration)
$s2=65m $(distance covered with uniform velocity)
Applying, $s=ut + 0.5at2 \\ 35= 0 + 0.5 a(5.4)2 \\ a= 2.4 m/s2 $
Applying, $v= u+at \\ v = 2.4*5.4 = 12.96 m/s $
Now, time required to cover $65m$ with uniform velocity …
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