Question

find the initial velocity of a bike which is stopped in 10 s by applying brakes. The retardation due to brakes is 2.5m/s^2

Answer 1

15m/s i think...is it a right answer if yes i can explain if i can't

Answer 2

Hi i'm Ritam and i hope that this is correct

v=final velocity =0. 
u=initial velocity 
a=acceleration 
t=time = 10 s 
v=u+at 
here it is retardation and therfore a is taken as -2.5 m/s2 
therefore the equation becomes 
0=u-2.5*10. 
u-25=0. u=25 m/s 

i hope this is the correct answer.

Hopw this helps you and you get it.