There are two main types of collisions that you will study:perfectly elastic collisions and perfectly inelastic collisions.When two objects collide elastically, both total kinetic energy andtotal momentum are conserved. These two conservation laws allow thefinal motion of the two objects to be determined. When two objectscollide inelastically, total momentum is conserved, but the totalkinetic energy is not conserved. After an inelastic collision thetwo objects are stuck together, and thus travel with the same finalvelocity; this fact, together with conservation of momentum, allowsthe final motion of the two objects to be calculated.

In reality, there is a range of collision types, with elastic andperfectly inelastic at the extreme ends. These extreme cases allowfor a more straightforward analysis than the in-between cases. Theapplet at the end of the problem will give you a chance to explorethe "in-between" collisions.
If the collision is perfectly elastic, what are the finalvelocities v_1 and v_2 of objects 1 and 2?
Now suppose that the collision is perfectly inelastic. What are thevelocities v_1 and v_2 of the two objects after thecollision?
Now assume that the mass of object 1 is 2m, while the mass ofobject 2 remains m. If the collision is elastic, what are the finalvelocities v_1 and v_2 of objects 1 and 2?
Let the mass of object 1 be m and the mass of object 2 be 3m. Ifthe collision is perfectly inelastic, what are the velocities ofthe two objects after the collision?

What is it that have an advantage but doesn't have any disadvantage?

In physics, what does it mean to say that a quantity (such asenergyor momentum) is conserved?

what does indirect mean in physics?

HOW DOES PHYSICS APPLY TO CONSTRUCTION