IV. Challenge1. What is Frictional Energy? What role does it play in t

1.	IV. Challenge1. What is Frictional Energy? What role does it play in the total mechanical energy of a body?
Answer» When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). This property can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire. Ariction is a type of dissipative force that always opposes the relative motion between any two objects (Note : this relative motion occurs between the surfaces in contact of the two objects) so it would decrease the kinetic energy (as it is opposing in nature) only if no external force is applied (equivalent to the value of frictional force) in the direction of motion (i.e. opposite to the direction of friction).

IV. Challenge1. What is Frictional Energy? What role does it play in the total mechanical energy of a body?

Answer»

When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). This property can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire.

Ariction is a type of dissipative force that always opposes the relative motion between any two objects (Note : this relative motion occurs between the surfaces in contact of the two objects) so it would decrease the kinetic energy (as it is opposing in nature) only if no external force is applied (equivalent to the value of frictional force) in the direction of motion (i.e. opposite to the direction of friction).

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