P2 forces

• What is the definition of scalar quantities?

  Scalar quantities have magnitude only and no direction
• Can you name some examples of scalar quantities?

  Mass, temperature, speed, energy, distance, and time
• Why is distance considered a scalar quantity?

  Because it gives no idea of direction
• What is the key characteristic of scalar quantities?

  They have magnitude only
• What are some examples of vector quantities?

  Displacement, weight, force, velocity, acceleration, and momentum
• How does displacement differ from distance?

  Displacement is distance in a specific direction
• If you travel 800 meters but your displacement is 500 meters due west, what does this indicate?

  You traveled a longer distance than your displacement indicates
• How can vectors be represented visually?

  Vectors can be represented by arrows
• What does the length of an arrow represent in vector representation?

  The length of the arrow represents the magnitude of the vector
• What does the direction of an arrow represent in vector representation?

  The direction of the arrow represents the direction of the vector
• What are the key differences between scalar and vector quantities?

  • Scalar quantities:
  • Have magnitude only
  • Examples: mass, temperature, speed, energy, distance, time
  • Vector quantities:
  • Have both magnitude and direction
  • Examples: displacement, weight, force, velocity, acceleration, momentum
• What is the definition of a force?

  A force is a push or a pull that acts on an object due to the interaction with another object.
• What are the two characteristics of a force?

  All forces have both magnitude and direction.
• What is the unit of force?

  The unit of force is the Newton.
• How can forces be categorized?

  Forces can be divided into contact forces and non-contact forces.
• What is a contact force?

  A contact force occurs when two objects are physically touching.
• What is an example of a contact force?

  Tension in a rope is an example of a contact force.
• In a tug of war, what type of force is acting on the soldier?

  The force of tension is pulling on the soldier.
• How does friction act on an airplane landing on the sea?

  The force of friction acts between the water and the airplane, causing it to slow down and stop.
• What is a non-contact force?

  A non-contact force occurs when two objects are physically separated.
• What is an example of a non-contact force?

  The gravitational force attracts all objects to other objects.
• How does gravitational force act on the International Space Station?


  The gravitational force attracts the International Space Station to the Earth.
• What is the electrostatic force?

  The electrostatic force is the force between two charged objects.
• How do opposite and same charges interact through electrostatic force?

  Opposite charges experience an electrostatic force of attraction, while like charges experience a force of repulsion.
• What does the magnetic force act on?

  The magnetic force acts on certain objects in a magnetic field.
• What type of quantity is gravity?

  Vector quantity
• Why is gravity classified as a non-contact force?

  Because the two objects do not need to be touching
• What does the mass of an object tell us?

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

  Kilogram
• Why is mass considered a scalar quantity?

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

  No, it remains the same regardless of location
• What is the definition of weight?

  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 does depend on where it is
• What is the symbol for gravitational field strength?

  Lowercase g
• What does gravitational field strength measure?

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

  Weight in Newtons = mass in kilograms × gravitational field strength in Newtons per kilogram
• What happens to the weight of an object if its mass is doubled?

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

  Newton meter
• How does gravitational field strength vary?

  It depends on where you are