Question

A car start moving with 36km/h.A long positive x-axis.Accelerarion of car is 2m/s^2.weak a toy x a long negative Xaxis. find displacement travalled by car between time=4s,time=2s

Answer 1

d=v0t +1/2.at2
for t=2
d1=72+4=76
for t=4
d2=144+16=160

displacement=160-76=84 m

Answer 2

refer to the attachment