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ICSE Class 9 Answered

please give answer of this question
Asked by ravirajmunde428 | 12 Jul, 2022, 08:45: PM
Expert Answer
Initial velocity = 18 km/hr = ( 18  × 5/18 ) m/s = 5 m/s
 
If the toy car stops in 2 s, then retardation a is determined from the equation " v = u - a t " , where v = 0 is final velocity and u is initial velocity 
 
retardation a = u / t = 5 /2 = 2.5 m/s2
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