Define kinetic and potential energy with formula.
Answers
Answer:
Kinetic energy is defined as the energy present in an object from the state of rest to motion. Potential energy is defined as the energy contained in an object by the virtue object's position. Formula used is KE=\frac{1}{2}mv^{2} The formula used is mgh.
Explanation:
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Answer:
Kinetic Energy Explanation
To accelerate an object we have to apply force. To apply force, we need to do work. When work is done on the object, energy is transferred and the object now moves with a new constant speed. The energy that is transferred is known as kinetic energy and it depends on the mass and speed achieved.
The definition of kinetic energy in Physics
“Kinetic Energy is the energy possessed by the body by virtue of its motion”
Kinetic energy is a scalar quantity. Kinetic energy is completely described by magnitude alone.
Kinetic Energy Transformation
Kinetic energy is transferred between objects and can be transformed into other forms of energy. Yo-Yo is a great example to describe the transformation of kinetic energy. While beginning to play with it, one starts by letting it rest in the hand, at this point, all the energy is stored in the ball in the form of potential energy. Once the person drops the yo-yo the stored energy is transformed into kinetic energy, which is the energy of movement. Once the ball reaches the very bottom of the yo-yo all the energy is converted to kinetic energy. As it moves back to the hand, all the energy is once again converted to potential energy when it reaches the hand.
Units of Kinetic Energy
The SI unit of kinetic energy is Joule which is equal to 1 kg.m2.s-2.
The CGS unit of kinetic energy is erg.
Measuring Kinetic Energy
The kinetic energy equation is given as follows:
KE=1/2mv^2
where, KE is the kinetic energy, m is the mass of the body and v is the velocity of the body.
Deriving Kinetic Energy Equation
Kinetic energy equation can be obtained by the basic process of computing the work (W) that is done by a force (F). If the body of mass m was pushed for a distance of d on a surface by applying a force that’s parallel to it, then the work done would be:
W = F. d = m. a. d
The acceleration in this equation can be substituted by the initial (vi) and final (vf) velocity and the distance. This we get from the kinematic equations of motion.
W = m. a. d
= m. d. ( v^2f - v^2i ) / 2d
= m. ( v