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# A car accelerates from rest at a rate of 4m/s2 for 10 s. Calculate the speed of the car at the end of 10 s? [Unless otherwise stated, use g=10m/s2 and neglect air resistance ]14 m/s6 m/s0.4 m/s40 m/s2.5 m/s

A
6 m/s
B
0.4 m/s
C
14 m/s
D
2.5 m/s
E
40 m/s
Solution
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#### Given : Initial velocity u=0 m/s Acceleration a=4 m/s2Time t=10 s Using first equation of motion v=u+at∴ v=0+4(10)=40 m/s

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