In the absence of non-conservative forces, the total mechanical energy of an isolated system is:
Always constant
The law of conservation of mechanical energy states that for an isolated system acted upon only by conservative forces (such as gravity or an ideal spring force), the sum of kinetic energy and potential energy remains unchanged over time.
Non-conservative forces such as friction or air resistance are responsible for dissipating mechanical energy as heat or sound; in their absence, no such loss occurs.
Therefore, the total mechanical energy of the isolated system remains always constant.
Similar Questions
A 3 kg object moving at 8 m/s comes to rest after covering 12 m on a rough surface. What is the magnitude of the average frictional force acting on it ?
Important Questions from Work Power Energy
The energy possessed by a body due to its change in position or shape is called
Wind turbines convert ________ energy into mechanical power.
What is represented by the product of force with displacement in the direction of force?
The rate of doing work is called:
What powers the Earth's internal heat engine?
