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Figure 2: Examples ofcollisionsModule 3Elastic and inelastic CollisionA collision is an isolated event in which two or more bodies (the colliding bodies) exert relatively strong forceson each other for a relatively short period of time.In other words, a brief event in which two or more bodies come together; "thecollision of the particles resulted in an exchange of energy and a change ofdirection". Although the most common colloquial use of the word "collision"refers to accidents in which two or more objects collide, the scientific use of theword "collision" implies nothing about the magnitude of the forces.Some examples of physical interactions that scientists would considercollisions:An insect touches its antenna to the leaf of a plant. The antenna is said to collide with leaf.A cat walks delicately through the grass. Each contact that its pawsmake with the ground is a collision. Each brush of its fur against ablade of grass is a collision.When two ships collide each other – called two body collision. In all collisions, momentum is conserved. Energy, as the sum of all its forms, isalso conserved every time. These two principles—conservation of momentumand conservation of energy—hold true at all levels: at the grand scale of starsand galaxies, in everyday situations such as collisions between balls on abilliard table, through to the atomic interactions between the particles that make up matter. Collisions are1