Question

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration in meters per second per second (i.e. m/s/s or m/s2)?

Answer 1

Answer:

220 m/s²

Explanation:

given,

initial speed of car= 22 m/s

final speed of car= 0 m/s

time taken by car to stop= 0.1 s

acceleration of car is equal to change in velocity per unit time

  $a = \dfrac{\Delta v}{t}$

  $a = \dfrac{v_f-v_i}{t}$

  $a = \dfrac{0-22}{0.1}$

         a = -220 m/s²

negative sign represent deceleration of the body

hence, deceleration of car is equal to a = 220 m/s²