)The work done by friction in Physics 11 is the amount of energy that is expended when an object is moved along a surface while experiencing frictional force. It is a measure of the resistance to motion caused by the interaction between two surfaces.
The work done by friction can be calculated by multiplying the force of friction by the distance the object moves along the surface. This can be represented by the equation W = Fd, where W is the work done, F is the force of friction, and d is the distance.
The work done by friction is affected by several factors, including the coefficient of friction, the weight of the object, and the nature of the surfaces in contact. The coefficient of friction is a measure of how rough or smooth the surfaces are, and a higher coefficient will result in more work done by friction.
The work done by friction results in the conversion of mechanical energy (such as kinetic energy) into thermal energy. This means that the energy of a system decreases as work is done by friction. This decrease in energy is known as energy dissipation.
No, the work done by friction is always negative because it is a form of energy loss. This means that the amount of energy in a system will always decrease when work is done by friction.