A Log of Wood Cut by a Saw Becomes Hot. from Where Does this Heat Energy Come?

A log of wood cut by a saw becomes hot. From where does this heat energy come?

One Line Answer

This heat energy comes from the mechanical energy.

shaalaa.com

Is there an error in this question or solution?

Chapter 1: Force, Work, Energy and Power - Exercise 1.5 ii [Page 54]

Chapter 1 Force, Work, Energy and Power
Exercise 1.5 ii | Q 23 | Page 54

Write an expression for the potential energy of a body of mass m placed at a height h above the earth's surface. State the assumptions made, if any.

Differentiate between the potential energy (U) and the kinetic energy (K).

Select the renewable and non-renewable sources of energy from the following:
Water

Select the renewable and non-renewable sources of energy from the following:
Diesel

Name the two groups in which various sources of energy are classified?

How much hydro-electric power is generated in India?

Give one example when:

Electric energy changes to sound energy.

Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?

A good fuel should possess:

The major problem in harnessing nuclear energy is how to