Question

9. A car travelling at 60 km/h uniformly retards for
10 s and attains a velocity of 45 km/h. Find the
the
retardation.
[Ans. 0.42 m/s]​

Answer 1

Answer:

0.42 m/s

Explanation:

v=u+at

v=45 km/h=45*5/18 m/s

u=60km/h=60*5/18 m/s

45*5/18=60*5/18+a*10

5/18(45-60)=a*10

5*15/18*10=a

a=0.42 m/s