Question

a car has retardation 5m/s^2 And comes to rest in 1.5 clalculaate it's initial velocity​

Answer 1

Answer:

7.5m/s

Explanation:

v=0

t=1.5s

a=-5m/s²

v=u+at

u=v-at = 0-(-5)1.5 =7.5m/s

Answer 2

answer: initial velocity= 7.5m/s

explanation:

here ,

retardation= 5m/s^2= -5 m/s^2

time = 1.5 sec

we have , v= u+at

here final velocity v = 0 ( rest )

initial velocity u = ?

acceleration= retardation= 5m/s^2

=> 0= u+ (-5)(1.5)

=> u= 7.5m/s