centre of mass and weight

• What is gravity?

  A force of attraction between all objects
• Why is gravity classified as a non-contact force?

  Objects do not need to be touching
• What type of quantity is gravity?

  Vector quantity
• What does the mass of an object indicate?

  How much matter the object has
• What is the unit of mass?

  Kilogram
• Why is mass considered a scalar quantity?

  It has no direction
• Does the mass of an object change based on its location?

  No, it remains constant
• What is weight defined as?

  The force acting on an object due to gravity
• What is the unit of weight?

  Newton
• Does the weight of an object depend on its location?

  Yes, it varies with location
• How much gravitational force does a 1 kg object experience on Earth?

  9.8 Newtons
• What is the symbol for gravitational field strength?

  Lowercase g
• What does gravitational field strength measure?

  The force of gravity in a location
• How do you calculate the weight of an object?

  Weight = mass × gravitational field strength
• Is the weight calculation equation provided in the exam?

  No, you need to learn it
• What is the weight of a 1 kg mass on Earth?

  9.8 Newtons
• What happens to the weight if the mass is doubled?

  The weight also doubles
• What is a calibrated spring balance also called?

  Newton meter
• What does gravitational field strength depend on?

  Where you are located
• What is the weight of a 100 kg object on Earth?

  980 Newtons
• What is the gravitational field strength on the Moon?

  1.6 Newtons per kilogram
• What happens to the weight of an object on the Moon?

  It decreases due to lower gravity
• What is the center of mass?

  The point where weight acts on an object
• Why is it important to learn the definition of center of mass?

  It could come up in your exam
• What are the key concepts related to weight and mass?

  • Weight is the force due to gravity.
  • Mass is the amount of matter in an object.
  • Weight depends on location; mass does not.
  • Gravitational field strength varies by location.
  • Weight can be calculated using the formula: Weight = mass × gravitational field strength.