Question

A body moving in a straight line at 72 km per hour undergoes an acceleration of 4 m per second square find the speed after 2 seconds

Answer 1

the answer to your question

Answer 2

Answer:

Speed, v = 28 m/s

Explanation:

It is given that,

Initial velocity of body, u = 72 km/h = 20 m/s

Acceleration of the body, a = 4 m/s²

We have to find the speed of the body after 2 seconds. It can be calculated suing first equation of motion as :

$v=u+at$

$v=20\ m/s+4\ m/s^2\times 2\ s$

v = 28 m/s

So, the speed of the car after 2 seconds is 28 m/s. Hence, this is the required solution.