Forces (part 2)

• Force

  • Force is a push or pull

  • S.I unit = Newton (N)
• Types of Forces

  • Non-contact force (A type of force that acts on an object without physical contact between the objects)

  • Contact force (A type of force that acts on an object with physical contact between the objects)
• Gravitational force

  • Gravitational force or gravity causes objects to have weight

  • The stronger the gravitational pull, the greater the weight of an object

  • To find weight = Mass x Gravitational force

  • The gravitational force of the earth = 10 N/kg
• Magnetic force

  • Magnetic force is a non-contact force

  • Like pole repel, Unlike pole attract