Everything

• What is a scalar quantity?

  A quantity with magnitude only
• How is a vector quantity represented in physics?

  Using an arrow indicating magnitude and direction
• What are contact forces?

  Forces experienced when objects touch
• What are non-contact forces?

  Forces acting without physical contact
• What is the weight of an object?

  The force acting on it due to gravity
• How does weight change on different planets?

  It decreases with lower gravitational field strength
• What is the equation linking weight, mass, and gravitational field strength?

  Weight = Mass × Gravitational field strength
• What units are used for weight, mass, and gravitational field strength?

  Weight in Newtons, mass in kilograms
• What is a common misconception about weight and mass?

  Weight is often confused with mass
• What instrument is used to measure weight?

  Newton meter
• Where does weight act on an object?

  At the center of mass of the object
• What is the resultant force?

  A single force equivalent to multiple forces
• If two forces of 4 Newtons act in the same direction, what is the resultant force?

  8 Newtons
• If a 6 Newton force acts against a -6 Newton force, what is the resultant force?

  0 Newtons
• How can a single force at an angle be resolved?

  Into two components at right angles
• How do you draw a scale diagram for resultant forces?

  Use a ruler to represent forces accurately
• What is a free body diagram?

  A diagram showing all forces on an object
• What does a free body diagram of an accelerating car show?

  Forces acting in different directions on the car
• What is work done by a force?

  When a force causes movement through distance
• What is the equation for work done?

  Work done = Force × Distance
• What is the unit of work done?

  Joules
• What happens when work is done against friction?

  It results in a temperature increase
• What is deformation?

  Changes in shape due to applied forces
• What are the types of deformation?

  • Elastic deformation: Reversed when force is removed
  • Inelastic deformation: Not fully reversed when force is removed
• What does Hook's law state?

  Extension is proportional to force applied
• What is the equation for Hook's law?

  Force = Spring constant × Extension
• What is the difference between a scalar and a vector quantity?

  A scalar quantity has only magnitude, while a vector quantity has both magnitude and direction
• What is the difference between contact and non-contact forces?

  Contact forces require physical touching, while non-contact forces act between objects that are physically separated
• What is the relationship between the weight of an object, its mass, and the gravitational field strength?

  Weight = mass × gravitational field strength
• What is the unit for weight?

  Newtons
• Why is weight different from mass?

  Weight is the force acting on an object due to gravity, while mass is the amount of matter in an object
• If an object's mass remains constant, how would its weight change if it was taken to the Moon?

  The weight would decrease because the gravitational field strength on the Moon is lower than on Earth
• What is the formula for calculating the resultant force acting on an object?

  Resultant force = vector sum of all forces acting on the object
• How can a single force acting at an angle be resolved into two perpendicular components?

  The force can be split into a horizontal component and a vertical component using trigonometry
• How can the resultant of two perpendicular forces be determined using a scale diagram?

  Draw the two forces to scale on a diagram, then use the Pythagorean theorem to calculate the magnitude of the resultant force
• What is the definition of work done by a force?

  Work done = force × displacement in the direction of the force
• What is the unit for work done?

  Joules
• How is the increase in temperature of an object related to work done against friction?

  Work done against friction results in an increase in the temperature of the object
• What are the two main types of deformation?

  Elastic deformation and inelastic deformation
• What is the difference between elastic and inelastic deformation?

  Elastic deformation is reversible, while inelastic deformation is permanent