newtons second law

• What should you be able to describe by the end of the video on Newton's second law of motion?

  Newton's second law of motion and how to calculate force
• What happens to a stationary object if it experiences a resultant force of zero?

  It will remain stationary
• What occurs when a moving object experiences a resultant force of zero?

  It will continue moving at the same speed and direction
• What does a non-zero resultant force cause an object to do?

  Change its velocity
• How is acceleration related to resultant force according to Newton's second law?

  Acceleration is proportional to the resultant force
• How is acceleration related to mass according to Newton's second law?

  Acceleration is inversely proportional to the mass of the object
• If an object experiences a resultant force of 20 Newtons and another experiences 10 Newtons, how do their accelerations compare?

  The object with 20 Newtons will have twice the acceleration of the one with 10 Newtons
• If one object has a mass of 1 kg and another has a mass of 2 kg, both experiencing a resultant force of 20 Newtons, how do their accelerations compare?

  The 1 kg object will have twice the acceleration of the 2 kg object
• What is the equation used to calculate force?

  Force (N) = Mass (kg) × Acceleration (m/s²)
• Calculate the force needed to accelerate an object with a mass of 5 kg by 4 m/s².

  20 Newtons
• If a force of 50 Newtons is applied to an object with a mass of 0.5 kg, what is the acceleration?

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

  13 m/s
• What is the typical speed of cars on a motorway in the UK?

  30 m/s
• What is the typical acceleration when a car accelerates from a main road to a motorway?

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

  Around 2,000 Newtons
• What is inertia in the context of Newton's first law?

  It is the property of an object to stay stationary or keep moving unless a resultant force is applied
• How is inertial mass defined?

  As the ratio of the force needed to accelerate an object over the acceleration produced
• What does a large inertial mass require to produce a given acceleration?

  A larger force
• What does a smaller inertial mass require to produce a given acceleration?

  A smaller force
• 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 can be calculated using the equation: Force (N) = Mass (kg) × Acceleration (m/s²)
• What are the typical speeds and forces involved in road transport?

  • Main road speed: 13 m/s
  • Motorway speed: 30 m/s
  • Typical acceleration: 2 m/s²
  • Force for a family car: around 2,000 Newtons
• What is the relationship between inertia and Newton's first law?

  • Inertia is the property of an object to resist changes in its state of motion
  • An object will remain at rest or in uniform motion unless acted upon by a resultant force