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.

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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

Name the type of energy (kinetic or potential) possessed by the following:

A moving bus.

Name the type of energy (kinetic or potential) possessed by the following:

A bullet fired from a gun.

Give one relevant example for the following transformation of energy:

Electrical energy to mechanical energy.

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

What is solar energy?

Name the energy changes for the following:
electric ball

How is kinetic energy possessed by a moving body measured?

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

State the energy changes which take place when:

In a heat engine.

Give one example when:

Electric energy changes to potential energy.