PAPER 2 WHOLE

• What is a contact force?

  When objects are physically touching
• What is an example of a contact force?

  • friction
  • air resistance
  • tension
  • normal contact force
• What is a non-contact force?

  when objects are not physically touching
• What are examples of non-contact forces?

  • magnetism
  • electrostatic force
  • gravity
• What is a Scalar quantity?

  quantity that only has magnitude
• What is a Vector quantity?

  a quantity that has magnitude and direction
• What is Newton's first law?

  If the resultant force acting on an object is zero, the object will remain at rest or continue to move at a constant velocity
• What is Newton's Second Law?

  The acceleration of an object is directly proportional to the resultant force acting on it and inversely proportional to its mass.
• What is Newton's Third Law?

  When two objects interact, the forced that exert on each other are equal in magnitude and opposite in direction
• What are examples of Scalar quantity?

  • distance
  • speed
  • mass
  • energy
  • temperature
• What are examples of vector quantities?

  • velocity
  • acceleration
  • force
  • momentum
• What does Hooke's Law state?

  Force and extension are directly proportional
• What is a moment?

  The turning effect of a force
• What topics does AQA GCSE Physics Paper 2 cover?

  Forces, waves, magnetism, and space
• What is a force?

  A push or pull on an object
• What are the two types of forces?

  Contact forces and non-contact forces
• What is the significance of vectors in forces?

  They show direction and magnitude of forces
• How do you find the resultant force when two forces act on an object?

  Add the vectors, considering direction
• If two forces of 5 N and 2 N act in opposite directions, what is the resultant force?

  3 N to the right
• How do you calculate the resultant force of two perpendicular vectors?

  Use Pythagoras' theorem
• What does Newton's first law state?

  An object will not change velocity without a resultant force
• What is a scalar quantity?

  A quantity with only magnitude
• What is weight?

  The force due to gravity on an object
• How is weight calculated?

  Weight = mass × gravitational field strength
• What is the gravitational field strength on Earth?

  9.8 N/kg
• What must be true for forces to be balanced?

  The upward force equals the downward force
• What is the equation for work done?

  Work done = force × distance moved
• What is gravitational potential energy (GPE)?

  Energy gained when an object is lifted
• How is gravitational potential energy calculated?

  GPE = mass × g × height
• What does Hooke's Law state?

  Force equals spring constant times extension
• What is the unit for spring constant?

  Newtons per meter
• What happens to an elastic object when the force is removed?

  It returns to its original shape
• What does a straight line through the origin in a force-extension graph indicate?

  Directly proportional relationship between force and extension
• What is the formula for energy stored in a spring?

  Energy = 0.5 × k × e²
• What is a moment in physics?

  A turning force around a pivot
• How is moment calculated?

  Moment = force × distance to pivot
• What is the unit for moment?

  Newton meters
• What does the principle of moments state?

  Moments clockwise equal moments anticlockwise
• What is pressure in physics?

  How concentrated a force is over an area
• How is pressure calculated?

  Pressure = force / area