You need to state the whole question or we're just guessing.ellieee said:
oh but the answer is (11 000)(6.0) = 66 000 J thoughanuttarasammyak said:
So, what is D?ellieee said:
oh I was careless and didn't see properly , sorryonatirec said:
Work done against friction refers to the amount of energy expended in overcoming the resistance force of friction between two surfaces in contact. It is a measure of the effort required to move an object across a surface.
The work done against friction is calculated by multiplying the magnitude of the frictional force by the distance over which the force is applied. This can be represented by the equation W = Fd, where W is the work done, F is the frictional force, and d is the distance.
The amount of work done against friction is affected by several factors, including the type of surface, the weight of the object, and the speed at which the object is moving. Rougher surfaces, heavier objects, and higher speeds typically result in greater work done against friction.
Work done against friction is considered a loss of energy because it is converted into heat energy, rather than being used to do useful work. This is due to the fact that friction always opposes motion, resulting in some of the energy being dissipated as heat.
The amount of work done against friction can be reduced by using lubricants, such as oil or grease, to reduce the friction between surfaces. Additionally, using smoother surfaces, reducing the weight of the object, and minimizing the speed at which the object is moving can also help to reduce the work done against friction.
