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conservation of linear momentum inelastic and plastic collisions III) In each ca

ID: 2038960 • Letter: C

Question

conservation of linear momentum inelastic and plastic collisions III) In each case calculate percentage difference between; momentum, impulse and total kinetic energy, just-before and just-after collision. % Difference in Momentum-up total before-p total after) / p total beforel x 100 % Difference in K.E.-1(KE total before-K.E total after) / K.E total before! X 100 Questions 1- In general, how does total momentum just-before collision compare to total momentum just-after collision, for elastic, inelastic, and plastic collisions? 2- From your data, in which case the loss of Kinetic Energy is the greatest: elastic, inelastic or plastic collisions? 3. What are some factors that may cause the difference between total momentum, impulse, and total kinetic energy, just-before and just-after collision? 4. What happens to the Kinetic Energy lost during the collisions?

Explanation / Answer

1) Total momentum of system is always conserved before and after collision irrespective of wether it is elastic or plastic or inelastic collision.

2) Loss of energy is highest in plastic collision.

3) Some factors which can cause difference between momentum before and after collision are presence of some external forces such as friction etc.

4) Kinetic energy loss during plastic collision is converted into heat. during elastic collision is converted into potential energy and during inelastic collision is partialy converted into heat and partialy into potential energy