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1.Problem statement
Prove the average external force of a system of particles N starting from rest and ending at rest is zero.
If the system moves periodically prove the av. external force is zero in a period
I dont quite understand what i am asked .Since i dont have a definition for a average force of a system of particles. Yet i tried to derive the eq for momentum of a system.So this is the momentum of the system i found. Now i know that going from rest to rest change of momentum must be zero . But i have internal and external forces. So dont know how to proceed
Prove the average external force of a system of particles N starting from rest and ending at rest is zero.
Homework Equations
If the system moves periodically prove the av. external force is zero in a period
The Attempt at a Solution
I dont quite understand what i am asked .Since i dont have a definition for a average force of a system of particles. Yet i tried to derive the eq for momentum of a system.So this is the momentum of the system i found. Now i know that going from rest to rest change of momentum must be zero . But i have internal and external forces. So dont know how to proceed
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