Physics dynamics

• How is 1 Newton defined?

  1 Newton is the force needed to accelerate a 1 kg mass at 1 m/s².
• What is the SI unit of force?


  Newton (N)
• What is the definition of force in physics?


  Force is a push or pull acting on an object.
• What is the equation for force?


  F = ma (Force = mass × acceleration)
• If a force of 10 N acts on a mass of 2 kg, what acceleration will it produce?


  5 m/s²
• What is an example of a non-contact force?


  Gravitational force
• What are non-contact forces?


  Non-contact forces act between objects without physical contact.
• What is an example of a contact force?

  Friction
• What are contact forces?


  Contact forces occur when objects physically touch each other.
• What are balanced forces?


  Balanced forces have a net force of zero, keeping an object at rest or in uniform motion.
• What is a force diagram?


  A force diagram visually represents all the forces acting on an object.
• What are unbalanced forces?


  Unbalanced forces have a net force that is non-zero, causing an object to accelerate.
• What does Newton's First Law state?

  An object will remain at rest or in uniform motion unless acted upon by an external force.
• What does an arrow in a force diagram represent?


  An arrow represents the direction and relative magnitude of a force.
• What is inertia?

  Inertia is the resistance of any physical object to changes in its velocity.
• What happens to a book on a table if no forces act on it?


  The book remains at rest due to balanced forces.
• What happens to passengers in a bus when it suddenly stops?

  Passengers lean forward due to inertia.
• Why does a box slide forward when a car suddenly brakes?


  The box continues moving due to its inertia when the car stops.
• What is friction?


  Friction is a force that opposes the relative motion of objects sliding against each other.
• What are the types of friction?


  Static friction and kinetic friction.
• What is the formula for friction?


  F = μN (Friction force = coefficient of friction × normal force)
• What is static friction?


  Static friction prevents objects from starting to move.
• What is kinetic friction?


  Kinetic friction acts on objects that are already in motion.
• What are the effects of friction?


  Friction slows down moving objects, generates heat, and causes wear and tear.
• Can friction be both beneficial and detrimental?


  Yes, friction can help in movement but also cause wear and tear.
• Why is friction important?


  Friction allows us to walk, drive cars, and hold objects.