Question

a car accelerates uniformly from 0 to 72 km/h in 8 seconds what is the cars velocity

Answer 1

Explanation:

Let us convert 72kmph to metres per second={72×1000}/(60×60)=20m/sec

v=u+at. u is intial velocity.v is final velocity,a is acceleration and t is time

20=0+a×11•5

a=20/11•5=1•7391 m/sec^2

Hence acceleration=1•7391m/sec^2

v^2—u^2=2as. Where s is distance traveled

20×20=2×1•7391×s

s=115 metres