Question

An auto, starting from rest, undergoes constant acceleration and covers a distance of 1200 meters. The final speed of the auto is 60 meters/sec. How long does it take the car to cover the 1200 meters?

Answer 1

Answer:

It will take 40 sec

Explanation:

We have given that auto is starting from rest so initial velocity u = 0 m/sec

And final velocity is given as v = 60 m/sec

Distance traveled by car s = 1200 m

According third equation of motion we know that $v^2=u^2+2as$

So $60^2=0^2+2\times a\times 1200$

$a=1.5m/sec^2$

Now according to first equation of motion v = u+at

So $60=0+1.5\times t$

t = 40 sec