Contact and Non-Contact

• What is a force?

  A push or pull acting on an object
• How does a force act on an object?

  Due to interaction with another object
• What are the two types of forces between objects?

  • Contact forces
  • Non-contact forces
• What are contact forces?

  Forces where objects are physically touching
• What are non-contact forces?

  Forces where objects are physically separated
• What does friction do in contact forces?

  It opposes the motion between surfaces
• What is air resistance in contact forces?

  It opposes the motion of objects through air
• What is tension in contact forces?

  It is the force transmitted through a string or rope
• What is normal contact force?

  It acts perpendicular to the surface of contact
• What is gravitational force?

  It attracts objects towards each other
• What is electrostatic force?

  It arises from charged objects attracting or repelling
• What is magnetic force?

  It acts between magnetic materials or charges
• How can you calculate the movement of an object due to a force?

  Using Newton's second law of motion
• What happens when a force causes an object to move?

  The object accelerates based on the force applied
• What is energy transfer in the context of forces?

  When a force causes an object to move
• How does a force cause energy transfer?

  By causing an object to move from rest
• What factors affect the movement of an object when a force is applied?

  The object's mass and the force's magnitude
• If a force of $10 \text{ N}$ is applied to a $2 \text{ kg}$ object, what is its acceleration?


  $5 \text{ m/s}^2$
• How does the interaction between two objects affect the forces acting on them?

  Each object exerts equal and opposite forces