Physics

• The SI unit of energy is the joule (J).
• Work done = force x distance moved in direction of force
• Energy can be stored, transformed, or transferred between different stores.
• Heat transfer occurs when there is a temperature difference between two objects, with hotter objects losing heat and cooler ones gaining it.
• Power is defined as the rate at which work is done or energy transferred.
• Kinetic energy is the energy an object has due to its motion.
• Energy can be transferred from one object to another by work done or heat transfer.
• The formula for power is P=W/t, where W is work done and t is time taken to do the work.
• Elastic potential energy is the energy stored when an elastic material is stretched or compressed.
• Conduction involves particles colliding with neighboring particles, causing them to vibrate more rapidly and transferring kinetic energy through thermal conduction.
• Potential energy is the energy that an object has because of its position or state.
• Elastic potential energy is the energy stored in stretched springs or deformed solids.
• Increasing the speed of an object increases its kinetic energy.
• Gravitational potential energy is the energy associated with the height of an object above ground level.
• The law of conservation of energy states that energy cannot be created or destroyed but only transferred or changed from one form to another.
• Energy can change between different forms, such as electrical energy being converted into thermal energy when electricity heats up a wire.
• When a ball falls off a table it gains gravitational potential energy at the same time as losing kinetic energy.
• A car moving downhill loses kinetic energy while gaining gravitational potential energy.