Question

a car starting from test accelerates at a rate of 2m/sec^2. find the average speed in the first ten seconds

Answer 1

Average speed in first ten seconds in 10 m/s

Step-by-step explanation:

We have equation of motion s = ut + 0.5 at²

        Initial velocity, u = 0 m/s

        Acceleration, a = 2 m/s²  

        Time, t = 10 s      

     Substituting

                      s = ut + 0.5 at²

                      s = 0 x 10 + 0.5 x 2 x 10²

                      s = 100 m

      Distance traveled is 100 m

      Time taken is 10 seconds

We have

      Distance = Time x Average speed

      100 = 10 x Average speed

      Average speed = 10 m/s

Average speed in first ten seconds in 10 m/s