Mechanical Energy
Mechanical Energy
Mechanical Energy
Energy in an object which can create some motion in the object is known as mechanical energy. Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. There are two forms of mechanical energy that is kinetic energy (energy due to motion) or potential energy (energy due to the position). Mechanical energy of an object can be calculated as the sum of the kinetic energy and the potential energy of an object.
Kinetic energy :
Energy possessed by a body by virtue of its state of motion is called kinetic energy. A moving bus, a rolling ball are some examples of kinetic energy.
Potential energy :
Energy possessed by an object due to its position is called as potential energy. A stretched rubber band, a catapult are some examples of potential energy
For example :
The kinetic energy of an aeroplane at rest is zero. As the aeroplane is standing at the ground level its potential energy is zero on the ground. Then, its mechanical energy which is the sum of kinetic energy and potential energy is zero while it rests on the ground. When the same aeroplane flies, it has kinetic as well as potential energy. Their sum gives the aeroplane's mechanical energy in flight.
Conservation of Mechanical Energy :
The total mechanical energy of a system is conserved i.e. energy can neither be created nor destroyed , it can only be converted from one form to other.
K.E. + P.E. = constant
Which of the following are the example of kinetic energy. | |||
| Right Option : C | |||
| View Explanation | |||
An object possesses a potential energy of 135 J and kinetic energy of 25 J . The mechanical energy in an object will be _______________ | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following statements are true 1. The kinetic energy of an aeroplane at rest is zero. 2. The aeroplane standing at the ground level has zero potential energy. 3. The mechanical energy of the aeroplane at rest will be zero
| |||
| Right Option : C | |||
| View Explanation | |||
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