physics

• The third law of motion states that for every action, there is an equal and opposite reaction.
• For every action, there is an equal and opposite reaction.
• Work done = force x distance moved in same direction
• The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
• Energy can be transferred between objects by work done, heating or cooling, and electric current.
• A closed system does not allow matter to enter or leave it.
• Newton's second law of motion states that the rate at which an object changes its velocity is directly proportional to the resultant force acting on it and inversely proportional to its mass.
• An open system allows matter to enter and leave it.
• Force (N) = Mass (kg) x Acceleration (m/s^2)
• A system is anything on which we focus our attention when considering energy transfers.
• Acceleration (a) = Force (F)/Mass (m)
• Kinetic energy (KE) = mass x velocity^2
• If the net force acting on an object is zero, then it will remain at rest or continue moving with constant velocity (Newton's First Law).
• Energy can be transferred from one form to another but cannot be created or destroyed.
• Power = work done / time taken
• Mass is a measure of how much matter an object contains and is directly proportional to its inertia.
• An open system allows matter to enter or leave it.
• In an open system, both matter and energy can be exchanged with its surroundings.
• In a closed system, energy cannot be created or destroyed but only transferred from one form to another.
• Inertia is the tendency of an object to resist any change in its state of rest or uniform motion.
• An open system allows both energy and matter to flow into and out of it.
• Work done (Joules) = Force (N) x Distance moved (metres)
• In an isolated system, no energy enters or leaves the system.
• The equation for calculating kinetic energy (KE) is KE = 1/2 mv^2.
• When two objects interact with each other, they exchange momentum.
• Power (Watts) = Work done (Joules)/Time taken (seconds)
• The equation for Newton's second law of motion is F=ma.
• Work done is defined as the transfer of energy from one place to another due to a force moving through a distance.
• In a closed system, there are no exchanges with the surroundings.
• Kinetic energy (Joules) = 1/2 x Mass (kg) x Velocity squared (m/s^2)
• The first law of thermodynamics states that energy cannot be created or destroyed, only transferred from one form to another.
• The first law of thermodynamics, also known as the conservation of energy principle, states that energy cannot be created nor destroyed but can only change from one form to another.
• Potential energy (PE) = mass x gravitational field strength x height
• Energy transfer occurs whenever there are interactions between systems.
• The equation for power is P=W/t
• The equation for kinetic energy is KE = 1/2 mv^2.
• Thermal energy is transferred by conduction, convection, and radiation.
• The law of conservation of energy states that energy can only change its form, not be created or destroyed.
• When two objects collide, their total momentum remains unchanged.
• Gravitational potential energy is the energy stored by an object because of its position above ground level.