Weight mass and gravity

• What is the subject discussed in the material?

  Weight, Mass and Gravity
• Why is gravity considered important?

  It affects all masses and their interactions
• What does gravitational force do?

  Attracts all masses towards each other
• When do we notice gravity's effects?

  When one of the masses is very large
• What are the two important effects of gravity on a planet's surface?

  Objects fall towards the ground and have weight
• How do weight and mass differ?

  • Mass: Amount of 'stuff' in an object
  • Weight: Force due to gravity on an object
  • Mass is constant; weight varies with location
• What is mass measured in?

  Kilograms
• What is weight measured in?

  Newtons
• How does gravitational field strength vary?

  Stronger closer to the mass causing it
• What affects the weight of an object?

  The strength of the gravitational field
• What is the weight of a 1 kg mass on Earth?

  9.8 N
• What is the weight of a 1 kg mass on the Moon?

  1.6 N
• What is the formula for calculating weight?

  Weight = Mass × Gravitational Field Strength
• What is the approximate value of g on Earth?

  9.8 N/kg
• What is the approximate value of g on the Moon?

  1.6 N/kg
• What happens to weight if mass is doubled?

  Weight also doubles
• What does W ∝ m signify?

  Weight is directly proportional to mass
• How do you calculate the weight of a 5 kg mass on Earth?

  Weight = 5 kg × 9.8 N/kg
• How do you calculate the weight of a 5 kg mass on the Moon?

  Weight = 5 kg × 1.6 N/kg
• What are the steps to calculate weight on different celestial bodies?

  1. Identify mass of the object
  2. Use the formula: Weight = Mass × g
  3. Substitute g for the specific celestial body
  4. Calculate the weight in newtons
• What is the unit of measurement for weight?

  Newtons
• What is the unit of measurement for mass?

  Kilograms