Question

A car increases its speed from 20km/hr to 50km/hr in 10 seconds .what is its acceleration?

Answer 1

v=50km/hr=50*5/18=13.88m/s
u=20km/hr=20*5/18=5.55m/s
t=10s
a=(v-u)/t=(13.88-5.55)/10=0.833m/s²