physics gcse

• Mass


  The amount of matter an object contains. Measured in units such as kilograms (kg) or grams (g). It is a property of an object that is independent of its location or gravity.
• Weight


  The force exerted on an object by gravity. Measured in units such as newtons (N) or pounds (lb). It is the pull of gravity on an object.
• Example: Mass vs Weight


  An astronaut has a mass of 70 kg. On Earth, their mass is still 70 kg, but their weight is 686 N (153 lb) due to the force of gravity.
• Car on Earth vs Moon

  A car with a mass of 1200 kg has a weight of 11760 N (2650 pounds) on Earth and 1944 N (435 pounds) on the Moon due to differences in gravitational force.
• Weight and Gravity


  Weight (W) = Mass (m) × Gravity (G) shows the relationship between mass and weight, where mass remains constant but weight changes depending on gravitational force.
• Gravity and Weight


  Gravity pulls objects towards itself, and the strength of the force depends on the mass of the object and the planet/star it's near. This force is what we experience as weight, which can vary depending on the planet or star.
• Mass and Gravity


  The more massive an object is, the stronger its gravitational pull and the more it will be attracted to other massive objects.
• The speed of light is approximately 300,000 km/s.
• When white light passes through a prism, it separates into different colors due to refraction.
• Light travels at the same speed regardless of its frequency or wavelength.
• Second law - The acceleration produced in an object is directly proportional to the resultant force acting on it and inversely proportional to its mass.
• Red light bends least when passing through glass, while violet light bends most.
• Light travels at different speeds through different materials.
• When light passes from one material into another, it may change direction.
• When light passes from one material into another, it may change direction.
• White light consists of all visible wavelengths of light.
• White light consists of all visible wavelengths of light.
• When light passes from one material into another, it may change direction.
• Different frequencies of electromagnetic radiation travel at the same speed.
• Different frequencies of electromagnetic radiation travel at the same speed.
• Third Law - When two objects interact, the forces they exert on each other are equal and opposite.
• Third Law - When two objects interact, the forces they exert on each other are equal and opposite.
• Light travels at different speeds in different materials.
• Light travels at different speeds in different materials.
• Third Law - When two objects interact, the forces they exert on each other are equal and opposite.
• Refraction occurs when light bends as it moves from one medium to another.
• Refraction occurs when light bends as it moves from one medium to another.
• Electricity is produced by moving charged particles.
• Electricity is produced by moving charged particles.
• A current is the flow of charge around a circuit.
• A current is the flow of charge around a circuit.
• Electricity is produced by moving charged particles.
• Newton's First Law states that if no net external force acts on an object, then the velocity of the object remains constant.
• Newton's First Law states that if no net external force acts on an object, then the velocity of the object remains constant.
• Newton's First Law states that if no net force acts on an object, then the velocity of the object remains constant.
• Newton's First Law states that if no net force acts on an object, then the velocity of the object remains constant.
• The amount that light changes direction depends on the difference between the two refractive indices.
• The amount that light changes direction depends on the difference between the two refractive indices.
• The speed of light depends on the medium that it's travelling through.
• The speed of light depends on the medium that it's travelling through.