Question

A car acquire a velocity of 72 km/he in 10 sec starting from rest .Find accelaration average velocity and distance travelled in this time

Answer 1

final velocity (v)=72km/hr=(5/18)*72=20m/s
initial velocity (u)=0
time (t)=10 sec
acceleration=(v-u)/t
                     =(20-0)/10
                     =20/10
                     =2m/s²
distance travelled (s):
v²=u²+2as
20²=0²+2*2*s
400=4s
s=400/4
s=100m
average velocity=distance/time
                            =100/10
                            =10m/s