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 - 1.5 Graded Assignment [Page 57]

Chapter 1 Force, Work, Energy and Power
1.5 Graded Assignment | Q 56. | Page 57

Select the correct alternatives

The energy stored in an electric cell is

State the changes in form of energy while producing hydro electricity.

What do you understand by the kinetic energy of a body?

A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.

State the energy changes in the following case while in use:
a ceiling fan

State two disadvantages of using wind energy for generating electricity.

What kind of energy is possessed in a situation when?

Water stored in dams.

Give two examples each of renewable and non-renewable sources of energy?

Give one example when:

Electrical energy to heat energy.

What is the form of that graph between
(i) K.E. and velocity for a constant mass?
(ii) K.E. and mass for a constant velocity?