Momentum and CollisionMediumBloom L1
Question
Two charges moving under their only own mutual attraction separated by large distance initially. Then choose the correct statement(s)
Options
A.If both are free, mechanical energy is conserved.
B.If one is fixed and other is free, mechanical energy is conserved.
C.If one is fixed and other is free, momentum is conserved.
D.If both are free momentum is conserved.
Solution
Sol. consider both change as system. If both are free, net external force is zero so, mechanical energy and momentum is conserved.
If one is fixed, net external force is not zero so momentum is not conserved, but work done by external force is zero, so mechanical energy is conserved.
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