Newtons 2nd law

• What should you be able to describe by the end of the video?

  Newton's second law of motion
• What does Newton's second law of motion state?

  Acceleration is proportional to resultant force
• What happens if a resultant force is not zero?

  Object's velocity will change
• How do you calculate the force required to accelerate an object?

  Force = mass × acceleration
• What is the relationship between acceleration and resultant force?

  Acceleration is proportional to resultant force
• How does mass affect acceleration when force is constant?

  Greater mass results in smaller acceleration
• Calculate the force needed to accelerate a 5 kg object by 4 m/s².

  20 Newtons
• What is the acceleration of an object with a mass of 0.5 kg under a force of 50 Newtons?

  100 m/s²
• What is a typical speed of cars on a main road in the UK?

  13 m/s
• What is a typical acceleration when transitioning from a main road to a motorway?

  2 m/s²
• What force is required for a typical family car to accelerate?

  2,000 Newtons
• What is inertia in relation to Newton's first law?

  Objects resist changes in their motion
• How is inertial mass defined?

  Ratio of force to acceleration produced
• What does a large inertial mass require for acceleration?

  Larger force to produce given acceleration
• What are the key concepts of Newton's second law of motion?

  • Acceleration is proportional to resultant force
  • Acceleration is inversely proportional to mass
  • Force = mass × acceleration
• What are the typical speeds and forces in road transport?

  • Main road speed: 13 m/s
  • Motorway speed: 30 m/s
  • Typical acceleration: 2 m/s²
  • Force for family car: 2,000 Newtons
• What is the significance of inertia in motion?

  • Objects remain at rest or in uniform motion
  • Change in motion requires a resultant force