1.

A bus increases its speed for 32 km/h to 72 km/h in 10 secs then its acceleration

Answer»

U = 36 km/h
= 10 m/s

V = 72 km/h
= 72× 1000 / 60 × 60 
= 72000/ 3600
= 20 m/s 

t = 10 second 

a = v- u / t 
= 20 - 10 / 10 
= 1 m/s ^2



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