smbascug said:How can you tell if energy is coserved or not?
Mechanical energy is conserved if the only forces acting are conservative forces, like gravity. As Captain Zapp0 points out, here we have additional forces acting: the applied force and the friction. These forces do work on the object, changing its kinetic energy.smbascug said:How can you tell if energy is coserved or not?
Work is a measure of the energy transferred to or from an object by a force when the object is displaced. It is calculated by multiplying the magnitude of the force by the distance the object is moved in the direction of the force.
Energy is the ability of a system to do work. It can exist in many forms, such as kinetic energy, potential energy, thermal energy, and electromagnetic energy.
Work and energy are closely related concepts. Work is the transfer of energy from one object to another, while energy is the ability to do work. In order for work to be done, energy must be transferred from one object to another.
The formula for calculating work is W = F x d, where W is work, F is the magnitude of the force, and d is the distance the object is moved in the direction of the force.
According to the law of conservation of energy, energy cannot be created or destroyed, only transferred from one form to another. This means that the total amount of energy in a system remains constant. In the context of work and energy problems, this means that the work done on an object must be equal to the change in energy of that object.