What is the kinetic energy of the system before and after the collision ? What i

Question

What is the kinetic energy of the system before and after the collision ? What is the percentage of lost in kinetic energy during the collision? Explain the concept of conservation of energy ? What is the kinetic energy of the system before and after the collision ? What is the percentage of lost in kinetic energy during the collision? Explain the concept of conservation of energy ? What is the kinetic energy of the system before and after the collision ? What is the percentage of lost in kinetic energy during the collision? Explain the concept of conservation of energy ? Explain the concept of conservation of energy ?

Explanation / Answer

baing on the concept of law of conservation of kinetic energy

the kinetic energy before collsion =1/2m1u1^2+1/2m2u2^2

kinetic energy after collision =1/2(m1+m2)v^2

the ratio of percentage of lost in kinetic energy during system=m2/m1+m2

The concept of law of conservation of energy

def;-

"the total mechanical energy of a system is constant if the internal forces are conservative and external forces do no work "

mechanical energy E=PE+KE

E=U+K=constant

under only conservative forces mechanical energy of system is constant

E2=E1

=>K2+U2=K1+U1

K+U=constant

E=constant

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