A car starts from and attains a velocity of 54 km ` h^(-1)` if the acceleration of the car is from rest and attains a velcoity of 54 km `h^(-1)` . If the acceleration of the car is ` 3 m s^(-2)`, write the following steps in sequential order to find the time taken to accelerate the car.
(A) Write the relation between u,v,a and t, where t is the time taken to accelerae the car.
(B) Note the final velocity (v) and convert it into SI unit.
(D) substitute the given values and obtain the vlaue of t using ` t= (v-u)/a`

Options

A. ABCD
B. ABCD
C. CADB
D. CBAD

Answer

d

Explanation

( c) Note the intial velocity of the car u=0 and note down its acceleration.
(B) Note th final velocity (v) and convert into SI unit.
(A) Write the relation between u,v,a and t, where t is the time taken to accelerate the car .
(D) Substitute the given values and obtain the valu of t , using `t = ( v-u)/a`