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

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

एक पंक्ति में उत्तर

This heat energy comes from the mechanical energy.

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अध्याय 1: Force, Work, Energy and Power - Exercise 1.5 ii [पृष्ठ ५४]

अध्याय 1 Force, Work, Energy and Power
Exercise 1.5 ii | Q 23 | पृष्ठ ५४

Fill in the blank

Energy possessed by a compressed spring is ______ energy.

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

MULTIPLE CHOICE TYPE:

The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun

Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.

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

Give three examples of bodies possessing kinetic energy.

State the energy changes which take place when:

Burning of coal.

State the energy transformation on the following:

Electricity is obtained from wind energy.

A body of mass m falls from a height h₁ to a height h₂, above the ground (h₁ > h₂). What is the loss of potential energy?

Use your brain power!

How do we save fuel by using public transport?