Mass of the a ballis \"\" kg.
\
 
\
Mass of the a ball moving east with a speed of \"\" m/s.
\
It collides head-on with a ball of mass \"\" kg, at rest.
\
Thus, \"\" m/s.
\
Let the speed of the \"\" kg ball after the collision as \"\".
\
Let the speed of the \"\" kg ball after the collision as \"\".
\
(a)
\
Find the speed of the \"\" kg ball after the collision.
\
For head on elastic collisions,
\
\"\" and \"\".
\
Substitute corresponding values in the formulae.
\
\"\"
\
 
\
\
\"\" m/s.
\
\
\
Speed of the \"\" kg ball after the collision is \"\" m/s.
\
\

(b)

\

Find the direction of the velocity of the \"\" kg ball after collision.

\

As the \"\" kg is at the rest position.

\

Therefore, resultant follows the direction of \"\" kg ball.

\

Direction of the velocity of the \"\" kg ball after collision is east.

\

(c)

\
Find the speed of the \"\" kg ball after the collision.
\
For head on elastic collisions, \"\".
\
Substitute corresponding values in the formulae.
\
\"\"
\
 
\
\
\"\" m/s.
\
\

Speed of the \"\" kg ball after the collision is \"\" m/s.

\

(d)

\

Find the direction of the velocity of the \"\" kg ball after collision.

\

As the \"\" kg is at the rest position.

\

Therefore, resultant follows the direction of \"\" kg ball.

\ Direction of the velocity of the \"\" kg ball after collision is east.
\