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Question

Saket bought a new racing car and started testing the acceleration claimed by the company with uniform acceleration from 18.5 m/s to 46.1 m/s in 2.47 seconds. The distance traveled by him in this time will be-


  1. 56.2 m

  2. 81.9 m

  3. 49.7 m

  4. 79.8 m


Solution

The correct option is D

79.8 m


vi=18.5m/s                    vf=46.1m/s         t=2.47s
a=Change in vt
a=46.1ms18.5ms2.47 s
a=11.2 m/s2
d=vi×t+0.5×a×t2
d=(18.5m/s)×(2.47 s)+0.5×(11.2 m/s2)×(2.47 s)2
d=45.7 m+34.1 m
d=79.8 m

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