Question

ball is dropped downwards. After 1 sec another ball is dropped from the same point . What is distance between them after 3sec A 25m B 20m C 50m D 9.8m

Answer 1

h1=1/2 g t^2
h2=1/2 g (t-1)^2

h1-h2=1/2 (9.8)(3^2-2^2)=about 5*5