Question

a toy car initially moving with a uniform velocity of 18 kilometre per hour comes to stop in 2 seconds... find the retardation of the car in SI units

Answer 1

Converting Km/h into M/s.
18 Km/h × 5/18 = 5 M/s.

Initial velocity = 5 M/s
Final velocity = 0 M/s
Time taken = 2 seconds.

A = v-u/t
a = 0-5/2
a = -5/2 = -2.5 m/s².

Retardation of car will be 2.5 M/s².


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Answer 2

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