Question

A Cyclist is travelling at 15m .She applies
brakes so that she does not Collide with a wall
18m away. What deceleration must she have​

Answer 1

Answer:Initial velocity, u=15m/s Final velocity, v=0m/s Distance, s=18m Acceleration, a=? So, deceleration is 6.25 m/s2 .

Explanation:Using relation,v^2-u^2=2as

0^2+15^2=2a x 18

-225=36a

a=-225/36

a=-6.25m/s

So, declaration is 6.25m/s.