Question

a cyclist is traveling at 15 metre per second -1 he applies brakes so that she does not collide with a wall 18 M away what declaration Must she have

Answer 1

Here in the above question we are given

velocity = 15 m/s

Distance = 18 m

final velocity = 0 m/s ( applies brakes )

so using 3rd eqaution of kinematics

v^2 = u^2 + 2as

0 = 225 + ( –a ) × 18

18a = 225

a = 12.5 m/s^2.

Hope it helps!