Question

A car increases its speed from 20km/h to 50km/h in 10sec.what is its acceleration

Answer 1

acceleration is 5/6metre/sec whole square

Answer 2

acceleration is nothing but Chang in velocity per unit time
acceleration (a)=final velocity (v)- initial velocity (u)/time (t)
a=v-u/t
where final velocity = 50×5/18
initial velocity=20×5/18
time=10
a=250/18-100/18/10
a=150/18/10
a=150/18×1/10
a=5/6
here acceleration is 5/6 m/s^2
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