Answer:
Balanced forces are responsible for unchanging motion. Balanced forces are forces where the effect of one force is cancelled out by another. A tug of war, where each team is pulling equally on the rope, is an example of balanced forces. The forces exerted on the rope are equal in size and opposite in direction.
Explanation:
Answer:

Explanation:
Given that,
Mass of ball 1, 
Initial speed of ball 1, 
Mass of ball 2, 
Initial speed of ball 2,
(at rest)
After the collision,
Final speed of ball 2, 
Let
is the final speed of ball 1.
Initial momentum of the system is :



Final momentum of the system is :



According the law of conservation of linear momentum :
initial momentum = final momentum


So, the final velocity of ball 1 is (-2.616)m/s.
Answer:
if the balls drop potential energy turns into kinetic energy