# What is the final velocity of a bus if it starts from rest having acceleration of 0.8m/s2 until the distance of 1km ? How much time does it take to cover 1km?

1
Log in to add a comment

Log in to add a comment

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

Let v be final velocity ,that we have to find

u be initial velocity,which is 0

acceleration(a)=0.8m/s^2,distance(s)=1 km=1000 m

Now,we use third law of motion because time is not there

v^2-u^2=2as

v^2-0=2*0.8*1000

v^2=1600

v=40 m/s

so we got the v

now putting the value in first law of motion

v=u+at

40=0+0.8t

40=0.8t

t=50 seconds

u be initial velocity,which is 0

acceleration(a)=0.8m/s^2,distance(s)=1 km=1000 m

Now,we use third law of motion because time is not there

v^2-u^2=2as

v^2-0=2*0.8*1000

v^2=1600

v=40 m/s

so we got the v

now putting the value in first law of motion

v=u+at

40=0+0.8t

40=0.8t

t=50 seconds