Question

A cyclist is travelling at 15 m / s. she applied brakes so she does not colloid with a wall 18 m away. What deacceleration must she have?

Answer 1

In question the final velocity is given as 15 and initial velocity is 0. Then distance is 18m then deceleration will be calculated as v sq = u sq-2as . (15) sq = (0)sq- 2×a× 18=-6.25