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A car is moving in a straight line with speed 18 km/h.It is stopped in 5 s by applying the brakes.find: :.iii)the speed of the car after 2 s of applying

the brakes.



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Initial speed, u=18km/h=5m/s
final speed, v=0km/h

velocity of car t seconds after applying the breaks is given by

plugin the given values above and find a :
0=5+a(5)\implies a=-1m/s^2

therefore the velocity of car as a function of time is

plugin t=2 for the velocity of car 2 seconds after applying breaks:
0 0 0
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