Question

Two balls are thrown vertically up from same
point on ground with same speed of 20 m/s at an
interval of 2 s. At what height above ground they
will hit each other?​

Answer 1

Answer:

Explanation:

Let at t and t+2 they will collide

At that point both has same displacement hence

S1=s2

Ut+1/2at^2=u(t+2)+1/2a(t+2)^2

Solve for t then find s1 or s2