Stored Energy When Raising Object
When an object is lifted from the ground, work is performed against the force of gravity. This work done results in energy being stored within the object due to its elevated position.
Identifying Stored Energy Type
The type of energy stored due to an object's position relative to a gravitational field is known as Potential Energy. As the object is raised to a higher position, its gravitational potential energy increases.
The formula associated with gravitational potential energy is:
$PE = mgh$Here, '$m$' represents the mass of the object, '$g$' denotes the acceleration due to gravity, and '$h$' signifies the height of the object above a reference point, typically the ground.
Analyzing Other Energy Options
The other options provided do not accurately describe the energy stored when an object is raised:
- Electrical energy: This form of energy is related to electric charges and fields, not the mechanical position of an object.
- Heat energy: This energy relates to the temperature and molecular motion of a substance and is not directly stored by simply increasing an object's height.
- Kinetic energy: This is the energy an object possesses due to its motion. While motion occurs during lifting, the energy specifically stored because of the object's height is potential energy ($KE = \frac{1}{2}mv^2$). Kinetic energy is associated with velocity.
Therefore, raising an object from the ground leads to the storage of potential energy.
Important Questions from Work and Energy
If a force ‘F’ acts on a body such that body gets displaced through the distance ‘x’ in the direction of the force, then the work done by the force is ____________.
The kinetic energy of a moving object is dependent on which of the following quantities:
i) Mass of the body
ii) Square of the velocity
iii) PressureWhich of the following statements refer/s to the law of conservation of energy?
Statements:
I) Energy can be converted from one form to another form of energy.
II) Energy can neither be created nor destroyed.
The work done in moving 10 coulomb charges across the potential difference of 5 volts is______.
- Mechanical energy is the sum of _______.
