What happens to the energy used to overcome friction?
Friction and Energy When one object is sliding on another it starts to slow down due to friction. This means it loses energy. However, the energy doesn’t disappear. It changes from moving energy (also call kinetic energy) to heat energy.
What happens to work that is done to overcome friction?
When you move something that has a resisting force, like friction, then not all the energy you put in (work done) goes to kinetic energy. Some of the energy is lost to friction and dissipated as heat. That is called work done against friction.
How energy is wasted during friction?
Answer: The energy lost due to friction is the reduction in total energy of the object. By the law of conservation of energy, the energy lost is equal to the work done by the force applied to overcome the friction.
How are heat and friction related to energy loss?
Heat is transferred (lost) during this activity, too. There is friction when the blades of the scissors slide against each other to cut paper. Friction, the resistance to sliding, rubbing, or rolling of one material against another, requires extra work to overcome and results in energy loss through heat.
Why is the work done by friction negative?
In this problem, work done by friction will be negative because the force is applied in the opposite direction as the motion, and will decrease the initial energy, giving us a Final Energy result that is less than the initial energy because energy is lost to friction.
Where does the energy from friction go when sliding?
When one object is sliding on another it starts to slow down due to friction. This means it loses energy. It changes from moving energy (also call kinetic energy) to heat energy. Similarly, how do you calculate the energy lost due to friction?
How to calculate the kinetic energy of friction?
Since friction is always an opposing force you subtract this from the 38.5KJ and get the 8455J mentioned. This is the kinetic energy so 1/2mv^2 and you then multiply both sides by 2 and get 16910 = mv^2. The mass is 90kg so divide both sides by 90 and get v^2=187.8889. Square root this and you end up with 13.7m/s.