In a machine why is work output less than work input. friction is being converted into mechanical energy

thermal energy is being converted into friction

some energy is converted into thermal energy

thermal energy is being created by friction ​

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4

Then the answer would be d then