A toy car initially moving with a uniform velocity of 18 km/ h comes to a stop in 2 seconds.Find the retardation of the car.
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Answer:
18 km/h = 18*5/18 m/s
(to convert km/h into m/s multiply the speed in km/h by 5/18)
v=0
u=5
v=u+at
0=5+a*2
a= -2.5 m/s^2
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