Explain :
Energy, work, potential energy, kinetic energy
Explain :
Energy, work, potential energy, kinetic energy
Energy:
The ability to do work is called energy. Every person has different energies. For example: A 25 year old man can easily remove the table from its position but same work cannot be done by a 5 year old baby. So, we can say that energy is required to do work.
Work:
Scientifically, work is defined as the product of the force and displacement in the direction of force on an object.
If you lift the book to a certain height, then a force is exerted against gravity, which displaces the book. Hence, one can say that work is done on the book against the force of gravity.
Potential energy:
It is energy possessed by a body by virtue of its position or configuration.
Potential energy possessed by a body by virtue of its configuration is known as elastic potential energy.
Potential energy possessed by a body by virtue of its position with respect to the ground is known as gravitational potential energy.
Expression for the gravitational potential energy,
PE = mgh
Where, m = mass of the body
g = acceleration due to gravity
h = height of the object from the Earth
Kinetic energy:
A body possesses kinetic energy by virtue of its motion. A moving arrow can be embedded into an object. Hence, it is said that the arrow possesses kinetic energy.
Expression for kinetic energy:
K = (1/2)mv2
Where m = mass of the object
v = speed of the object
Energy:
The ability to do work is called energy. Every person has different energies. For example: A 25 year old man can easily remove the table from its position but same work cannot be done by a 5 year old baby. So, we can say that energy is required to do work.
Work:
Scientifically, work is defined as the product of the force and displacement in the direction of force on an object.
If you lift the book to a certain height, then a force is exerted against gravity, which displaces the book. Hence, one can say that work is done on the book against the force of gravity.
Potential energy:
It is energy possessed by a body by virtue of its position or configuration.
Potential energy possessed by a body by virtue of its configuration is known as elastic potential energy.
Potential energy possessed by a body by virtue of its position with respect to the ground is known as gravitational potential energy.
Expression for the gravitational potential energy,
PE = mgh
Where, m = mass of the body
g = acceleration due to gravity
h = height of the object from the Earth
Kinetic energy:
A body possesses kinetic energy by virtue of its motion. A moving arrow can be embedded into an object. Hence, it is said that the arrow possesses kinetic energy.
Expression for kinetic energy:
K = (1/2)mv2
Where m = mass of the object
v = speed of the object
