Weight, mass and gravitational field strength

• What is the force acting on an object due to gravity called?

  Weight
• How is weight measured?

  Weight is measured in newtons (N).
• What does the centre of mass represent?

  The centre of mass represents the mean position of the matter in a body.
• How does the shape of an object affect its centre of mass?

  The centre of mass can be inside or outside the object depending on its shape.
• What is the relationship between weight and mass?

  Weight and mass are directly proportional.
• How can weight be calculated?

  Weight can be calculated using the equation: weight = mass × gravitational field strength.
• What is the formula for calculating weight?

  $W =$$m \cdot g$
• In the formula $W =$$m \cdot g$, what does $W$ represent?


  $W$ represents weight measured in newtons (N).
• In the formula $W =$$m \cdot g$, what does $m$ represent?


  $m$ represents mass measured in kilograms (kg).
• In the formula $W =$$m \cdot g$, what does $g$ represent?


  $g$ represents gravitational field strength measured in newtons per kilogram (N/kg).
• If an apple has a mass of 100 g, what is its weight on Earth where $g =$$10 \text{ N/kg}$?


  The weight is $1.0 \text{ N}$.
• How do you convert 100 g to kilograms?

  100 g is converted to 0.1 kg.
• Calculate the weight of a 30 kg dog on Earth where $g =$$10 \text{ N/kg}$.


  The weight is $300 \text{ N}$.
• How is weight measured using a spring balance?

  A spring balance measures weight by balancing the object with a known force.
• What does Newton's third law state regarding weight measurement?

  Newton's third law states that the known force is the same as the weight if the object is stationary.
• What are the key concepts related to weight, mass, and gravitational field strength?

  • Weight is the force due to gravity, measured in newtons (N).
  • Mass is the amount of matter in an object, measured in kilograms (kg).
  • Gravitational field strength is the force per unit mass, measured in newtons per kilogram (N/kg).
  • Weight can be calculated using the formula: $W =$$m \cdot g$.