Gravity and weight

• What is gravity described as in the video?

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

  Because objects do not need to touch
• What type of quantity is gravity classified as?

  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
• What is the mass of the elephant mentioned?

  5,000 kg
• Does the mass of an object change based on location?

  No, it remains constant regardless of location
• 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 based on location
• What is the gravitational force experienced by a 1 kg object 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 does it mean that weight is directly proportional to mass?

  If mass doubles, 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 gravitational strength
• What is the weight of a 100 kg object on the Moon?

  160 Newtons
• 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.
• How do you calculate weight using mass and gravitational field strength?

  • Weight (N) = Mass (kg) × Gravitational field strength (N/kg)
  • Example: For 1 kg on Earth, Weight = 1 kg × 9.8 N/kg = 9.8 N
• What is the relationship between mass and weight?

  • Weight is directly proportional to mass.
  • Doubling mass doubles weight.
  • Weight varies with gravitational field strength.