What is the formula for potential and kinetic energy?
For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2.
What are the 5 main forms of energy?
The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.
Is work change in potential energy?
Potential energy and work done are the same thing as much as kinetic energy and work done are the same thing. Generally speaking in physics we are interested in conservative forces, and one of the definitions of a conservative force is that the work done is equal to the change in potential energy.
How do you derive potential energy?
The elastic potential energy formula derivation is:
- U = 1/2 kx2.
- g = acceleration (9.8 ms-2 on Earth)
- W = m × g × h = mgh.
- ΔU = GMm (1/ri – 1/rf) [ ri= initial position and rf= final position ]
- If ri > rf then ΔU is negative.
- ri = R and rf = R + h.
- When, h<
What is potential energy drive its formula?
Potential Energy Derivation Potential energy is the work done to take a body to a certain height. For a body with mass m, h is the distance to which it is raised and g is the gravitational force acting on the body, then work done W is given as: W = force * displacement. W = mg * h. ∴ W = mgh.
What is gravitational potential energy drive its formula?
Since the force required to lift it is equal to its weight, it follows that the gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules.
What is the expression of potential energy Class 9?
Expression for Potential Energy The potential energy (Ep) is equal to the work done over an object of mass ‘m’ to raise it by a height ‘h’. Thus, Ep = mgh, where g = acceleration due to gravity.
What do you mean by work class 9?
Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force.
What is work done class 9?
Work done on an object is defined as the product of the magnitude of the force acting on the body and the displacement in the direction of the force. W = F.s. If a force acting on a body causes no displacement, the work done is 0. For example, pushing a wall.
What is kinetic energy in chemistry class 9?
Hint:Kinetic energy is the energy that an object possesses due to its motion. It is basically the energy of mass in motion.
What is kinetic energy in the human body?
Kinetic energy is built up in an object by motion and can be defined as the energy that is needed to either slow it down or speed it up. Kinetic energy is also generated by the human body when it is in motion.
Why is kinetic energy scalar?
Kinetic energy is a scalar because it does not require direction to define it. The kinetic energy is given as (½)mv2. Here m is the mass which is a scalar quantity and v is the velocity which is a vector. The square of a vector quantity is a scalar.
At what position pendulum acquires the maximum kinetic energy?
The bob of a pendulum has maximum kinetic energy at the mean position. The total energy at any point remains constant. At the lowest point, Potential energy is zero.