What is head -on collision ?

Explanation

Due to the collision of two bodies if both bodies are in same direction or mutually opposite to each other then this collision is known as head on collision .
In performing an experiment on collision on a horizontal surface , we face three difficulties . One , there will be friction and bodies will not travel with uniform velocites .two , if two bodies of different uniform velocities . Two , if two bodies of different sizes collide on a table , it would be difficult to arrange them for a head - on collision unless theircentres of mass are at the same height above the durface . Three , it will be fairly unless their centres of mass are at the same height above the surface . Three , it will be fairly difficult to measure velocities of the two bodies just before and just after collision .
By performing this experiment in a vertical direction all the three difficulties vanish . take two balls , one of which is heavier (basketball /football /volleyball)and the other lighter (tennis ball / rubber ball /table tennis ball ) .First take only teh heavier ball and drop it vertically from some height ,say 1 m . Note to which it rises . this gives the velocitiesnear the floor or ground just before and just after the bounce ( by using `v^(2) =2gh`) Hence you will get the coefficent of restitution .
Now take the big ball and a small ball and hold them in your hands one over the other with the heavier ball below the lighter one as shown here , Drop them togethar ,taking care that they remain together while falling remain together while falling and see what happens , You will find that the heavier ball rises less than when it was dropped alone , while the lighter one shoots up to abut 3m . With particle , you will be able to hold the ball properly so that the lighter ball rises vertically up and does not fly sideways . this is head - on collision . You can try to find the best combination of balls which gives you the best combination of balls which gives you the best effect . You can measure the masses on a standard balance . We leave it to you to think how the best effect. You can try to find the best combination of balls which gives you the best effect . You can try to find the best combination of balls which gives you the best effect . You can measure the masses on a standard balance . We leave it to yu to think how you can determine the intial and final velocities of the balls .