PHYSICS 9

• The SI unit of energy is the joule (J).
• Electrical power can be calculated using the formula P = V x I, where P is power in watts, V is voltage in volts, and I is current in amperes.
• Power is measured in watts (W) or kilowatts (kW).
• Work-energy theorem states that the net work done on an object equals its change in kinetic energy.
• Kinetic energy is defined as KE = 1/2 mv^2.
• Gravitational potential energy is the energy associated with the height of an object above ground level.
• Potential energy is stored energy that comes from position or configuration.
• Potential energy is defined as PE = mgH.
• Elastic potential energy is stored when objects are stretched or compressed.
• Conservation of mechanical energy states that the sum of potential and kinetic energies remains constant during motion.
• Chemical potential energy is released during chemical reactions.
• Chemical potential energy is the energy released during chemical reactions.
• The work-energy theorem relates to the change in kinetic energy of an object due to external forces acting on it.
• Power is the rate at which work is being done.
• Work done by a force is equal to the product of the magnitude of the force, displacement, and cosine of the angle between them.
• Gravitational potential energy is the energy an object has due to its height above ground level.
• Work is defined as force times distance, with units of joules (J).
• Energy can be transferred from one form to another without changing its total amount.
• Energy can be transferred from one form to another without changing the total amount of energy present.
• The law of conservation of energy states that energy cannot be created or destroyed, only transformed into different forms.