When a log of wood cut with saw it becomes hot. Why?
Reason is that because of heavy friction between the saw and the wood, saw becomes hot.
Why does a mixer jar become hot when it runs for a few minutes?
Why does a saw become warm when it is used to cut a log of wood?
Q1)“energy stored in a spring of watch” Comment on it
1. State the energy changes taking place in the following cases: (1) A car moves up a