Physics

• Work done = force x distance moved in direction of force
• Energy can be transferred between objects by work done, heating or cooling, and electric current.
• Newton's third law states that for every action, there is an equal and opposite reaction.
• Newton's second law describes how the velocity of an object changes when it is subjected to an external force.
• Newton's first law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
• The SI unit of energy is the joule (J).
• Energy can be transferred from one object to another by work done or heat transfer.
• Energy is the ability to do work.
• When an object absorbs heat, its internal energy increases.
• Power = Work done / Time taken
• Heat transfer occurs due to temperature differences between two objects.
• Power is the rate of doing work.
• Work done = Force x Distance moved in direction of force
• Work done is calculated as F x s, where F is the magnitude of the force applied and s is the distance moved in the direction of the force.
• Ohmic conductors have a constant resistance.
• Inertia refers to the tendency of an object to resist any change in its state of motion.
• Momentum is defined as the product of mass and velocity.
• An ammeter measures the flow of charge through a circuit.
• A vector quantity has both magnitude and direction, while a scalar quantity only has magnitude.
• Inertia is the tendency of an object at rest to remain at rest, or an object moving with constant speed to continue doing so unless acted upon by a net resultant force.
• Work done on an object causes its kinetic energy to increase.
• Work done = Force x Distance moved