Question

a toy car initially moving moving with a uniform velocity of 18 km/h comes to a stop in 2 s.find the retardation of the car in si units

Answer 1

initial velocity = 18km/hr= 5m/sec

final velocity = o msec-1

time=2 sec

retardation= v-u/t
=o-5/2=(-2/5)msec-2

Answer 2

★ Hi , there !!★


here is your answer !!


U = 18km / h

change into m/ s


=> 5 / 18 × 18 => 5 m / s


V = 0


now ,
retardantion => negative of acceleration



=> V - U / t


=> 0 - 5 m / s / 2 s


=> - 2.5m/ s²



hope it helps you dear !!



thanks