Question

a ball falls off a table and reaches the ground in 1s. Assuming g=10m/s^2, calculate its speed on reaching the ground and the height of the table.

Answer 1

acc. to newtons equations
v = u + gt ( acceleration = acc. due to garvity )
v = 0 + 10 x 1
v = 10 m / s
the ball will reach the ground at a speed of
10 m/s

acc. to second equation
v^2 = u^2 + 2gs
100 = 0 + 2 x 10 x s
100 /20 = s
s = 5 m

Answer 2

hope it will help u.......