Question

A car starting from rest accelerates uniformly along a straight line. if it attains a velocity of 120 kmph in 12s. what is the acceleration of the car in m/s2 ?​

Answer 1

Answer:

25/9 m/s2

Explanation:

v= u +at

u= 0 as the car started from rest

t= 12 sec

120x 5/18 ( converting kmph to mps)= ax 12

Answer 2

Answer:

2.8

Explanation:

initial velocity is 0m/s. final velocity is 120km/h which equals 33.3 m/s. time taken is 12s. change of velocity is final minus initial velocity which is 33.3-0= 33.3m/s. Acceleration is time rate of change of velocity. so 33.3/12= 2.78 approx.