paper2

• What units might need to be converted in the exam?

  Masses in grams to kilograms
• What is the unit for force?

  Newtons
• What is the unit for mass?

  Kilograms
• What is the unit for distance?

  Meters
• What is the unit for speed or velocity?

  Meters per second
• What is the unit for time?

  Seconds
• What is the unit for gravitational field strength?

  Newtons per kilogram
• What is the unit for work done?

  Joules
• What is the unit for acceleration?

  Meters per second squared
• What is the unit for momentum?

  Kilogram meters per second
• What is the unit for frequency?

  Hertz
• What is the unit for magnetic flux density?

  Teslas
• What is the unit for current?

  Amps
• What is the unit for potential difference?

  Volts
• What are scalar and vector quantities?

  • Scalar quantities: Magnitude only (e.g., temperature, energy, speed)
  • Vector quantities: Magnitude and direction (e.g., velocity, momentum, forces)
• What is a free body diagram?

  • Represents forces acting on an object
  • Uses arrows to show direction and magnitude
  • Simplifies complex diagrams by focusing on forces
• What are contact and non-contact forces?

  Contact forces require touching; non-contact do not
• What are the four contact forces?

  Friction, air resistance, tension, normal contact force
• What does Newton's third law state?

  For every action, there is an equal and opposite reaction
• What is the relationship between mass and weight?

  Weight is the force due to gravity on mass
• How is mass measured?

  In kilograms
• How does gravity affect weight?

  Stronger gravity results in larger weight
• How can weight be measured?

  Using a calibrated spring balance or Newton meter
• What is the relationship between weight and mass on a graph?

  Weight and mass are directly proportional
• What is a resultant force?

  The overall force acting on an object
• How do you find the resultant force when forces act in the same direction?

  Add the forces together
• How do you find the resultant force when forces act in opposite directions?

  Subtract the smaller force from the larger
• What is the first law of motion?

  Resultant force of zero means no acceleration
• What does the second law of motion state?

  Acceleration is proportional to resultant force
• How does mass affect acceleration when force is applied?

  Heavier objects accelerate less with the same force
• What does Newton's first law state about resultant force?

  Zero resultant force means zero acceleration
• What happens to an object with zero acceleration?

  Its movement isn't changing
• What does Newton's second law state about acceleration?

  Acceleration is proportional to resultant force
• If I push an object twice as hard, what happens to its acceleration?

  It accelerates twice as much
• How does mass affect acceleration according to Newton's second law?

  Acceleration is inversely proportional to mass
• What is the equation that relates force, mass, and acceleration?

  Force = mass × acceleration
• What are the units for acceleration?

  m/s²
• Why is acceleration considered a vector quantity?

  It has a given direction
• What does a negative acceleration indicate?

  The object is slowing down
• What is the purpose of the required practical using an air track and glider?

  • Demonstrates acceleration
  • Frictionless environment
  • Uses a pulley system with weights
  • Measures velocity with light gates