The initial distance between two particles is 0.70 km. The particles head towards each other at speeds of 2.5 m/s and 4.5 m/s, respectively.
a)When will they meet?
b)Where will the meeting take place?
The Attempt at a Solution
they are closing at a speed of 2.5+4.5=7m/s (which we call the effective speed)
t=700/7 = 100 s.
so they will meet after 1.67 mins.
the meeting will take place 250m from where the slower particle started and 450m from where the faster particle has started.