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Q.

Statement-1: Internal forces cannot change mechanical energy of a system.
Statement-2: Total work done by external forces is always equal to change in KE of system

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a

Both statements are true 

b

Both statements are false

c

Statement 1 is false statement 2 is true

d

Statement 1 is true statement 2 is false 

answer is B.

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Detailed Solution

Internal non conservative forces can change ME

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