Question

A body moving with uniform acceleration is having velocity 2 metre per second and 8 metre per second at equal to 1 second and teacher 24 seconds respectively then average velocity of a particle is the time interval activa 21 second and third all the four secondary is

Answer 1

Answer:

The answer will be 20 m/s

Explanation:

According to the problem the acceleration of the body in different time interval is given ,

Let v1 = 2 m/s when the t = 1 second and v2 = 8 m/s when t = 24 seconds

We know the equation

v = u +at

Now at v = 2m/s when t =1

=> u+a = 2

and at v= 8 m/s and t = 24

=> u+24a = 8

Now let the distance covered by the body in time  1 sec to 24sec be r

r = 1/2 a t^2 [ at t = 21 sec] - 1/2 a t^2 [ at t = 1 sec]

   = 1/2 2 x 21^2 - 1/2 2 x 1

  =  440 meter

Now this distance is covered within (21-1) = 22 sec

therefore the velocity will be= 440/22 = 20 m/s