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

we can list the given data as,

initial velocity , u = 0m/s

time t = 1s

g = 10m/s²

To find - speed v = ?

               height h = ?

Solution- 

Using Newtons first equation of motion,

v = u + at

v = 0 + gt

v = gt = 10 x 1 = 10m/s 

Using Newton's second equation of motion 

put s=h , a = g , u =0m/s , t = 1s