Question

1. A ball falls off a table and reaches the ground in 1 s. Assuming g=10 m/s2,
calculate its speed on reaching the ground and the height of the table.

Answer 1

Hi dear !!!



here is your answer !!



time = √ 2h / g

1 = 2h / 10

h = 5 m

and


velocity => √ 2gh

=> √ 2× 10× 5

10 m/ s


hope it help you dear !!!

thanks !!!

Answer 2

given-initial velocity(u) = 0

          time(t)= 1s

         g= 10m/s^2

to find- final velocity (v)

             height of table (s)\

formulae - For free fall

                 v=gt     (v=u+at)

                s=1/2gt^2    (s=ut+1/2gt^2)

solution - v= gt

               v=10*1=10m/s

              s=1/2 gt^2

             s=1/2* 10*1^2

             s=1/2* 10

              s=5m

speed of ball= 10m/s

height of table = 5m

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