Answer:
Change in mechanical energy = work done by friction
so it is equal to

Explanation:
As we know that change in mechanical energy must be equal to the work done by non conservative forces only
So here when block moves down the inclined plane then the work done by friction force is given as

here we have

here we know that

so we have


Now the friction force on the block is given as



now work done by the friction is given as


The correct choice is ' D ' .
These are the numbers that are missing from the set of blocks at
the top, and also the bars missing from the graph in the middle.
I have no idea what the strip at the bottom labeled "full energy spectrum"
is trying to tell us.
Answer:
Tension.
Explanation:
I just had this question so I hope it sort of helps.