Physics

• What is Newtons first law?


  If forces acting on an object are balanced, there will be no change to the motion of the object.
• What is Newtons second law?


  Force= mass x acceleration
• What is an elastic material? 


  One that will return to its original shape when distorting forces are removed. Some objects are elastic when the forces are small , but behave inelastically when the forces are too big.
• What is Newtons third law?


  Newton's third law simply states that for every action there is an equal and opposite reaction.
• What are the ways that energy can be transferred?

  Heating, light, sound, electrically or by forces.
• What is a wavelength?


  The distance between two adjacent peaks ( or two troughs ) of the wave.
• What is gravitation field strength?


  Represents how strong the force due to gravity is on a planet
• What does momentum depend on?


  The mass and velocity of an object
• What are energy stores?


  Kinetic, gravitational, elastic potential, thermal, nuclear, chemical
• What can energy be transferred by?


  Heating, light, sound, electrically, or by forces
• Refraction definition


  The process by which a wave changes speed and sometimes direction upon entering a denser or less dense medium
• What Is a luminous object?


  One that emits its own light - we see them because the light they emit shines in our eyes
• What is a non-luminous object?


  One that does not emit light - we see it because light from a luminous object reflects of the object into our eyes
• What is the purpose of the Ed Excel GCSE Physics paper 1?

  It covers key concepts in physics for various tiers.
• What are the main topics covered in the Ed Excel GCSE Physics paper 1?

  Motion and forces, conservation of energy, waves, light, the EM spectrum, radioactivity, and astronomy.
• Why do we use prefixes in measurements?

  To simplify large or small numbers by expressing them in a more manageable form.
• How would you express 1,000 meters using a prefix?

  1 kilometer (1 km).
• What is the conversion factor for micrometers to meters?

  1 micrometer is equal to $10^{-6}$ meters.
• How do you convert 5 micrometers to meters?

  5 micrometers is $5 \times 10^{-6} \text{ m}$.
• What is a force?

  A force is any push or pull acting on an object.
• What are the two types of forces?

  Contact forces and non-contact forces.
• What is the difference between contact and non-contact forces?

  Contact forces involve physical touching, while non-contact forces do not.
• What is the term used to represent the size and direction of a force?

  A vector.
• How do you find the resultant force when two forces act in opposite directions?

  You subtract the smaller force from the larger force.
• If two forces of 5 N and 3 N act in opposite directions, what is the resultant force?

  2 N in the direction of the larger force.
• What is the significance of the length of a force vector?

  The length indicates the magnitude of the force.
• What happens if forces are balanced?

  The object will not accelerate and will maintain a constant velocity.
• What is Newton's first law of motion?

  An object will remain at rest or in uniform motion unless acted upon by a resultant force.
• What is weight in physics?

  Weight is the force due to gravity acting on an object.
• What is the difference between a scalar and a vector quantity?

  A scalar has only magnitude, while a vector has both magnitude and direction.
• How is weight calculated?

  Weight is calculated by multiplying mass by gravitational field strength.
• What is the approximate value of gravitational field strength on Earth?

  1. 8 N/kg, often rounded to 10 N/kg.
• What must be true for forces to be balanced when lifting an object?

  The upward force must equal the weight of the object.
• What is the equation for work done?

  Work done equals force times distance moved.
• How is gravitational potential energy (GPE) calculated?

  GPE is calculated by mass times gravitational field strength times height.
• What is the unit of energy?

  Joules (J).
• What does the gradient of a distance-time graph represent?

  The gradient represents speed or velocity.
• How do you find acceleration from a velocity-time graph?

  The gradient of the graph gives you acceleration.
• What does a negative gradient on a velocity-time graph indicate?

  It indicates that the object is decelerating.
• What is the acceleration due to gravity for falling objects?

  1. 8 m/s².