newtons first law

• What does Newton's 1st Law state about a moving object?

  A moving object will continue to move at the same speed and direction unless an external force acts on it.
• What does Newton's 1st Law state about a stationary object?

  A stationary object will remain at rest unless an external force acts on it.
• What is the effect of balanced forces on moving and stationary objects?

  Balanced forces do not change the motion of moving or stationary objects.
• What happens when there is a non-zero resultant force on an object?

  A non-zero resultant force causes a change in the motion of moving or stationary objects.
• How is circular motion at constant speed described in terms of velocity?

  Circular motion at constant speed is described as a changing velocity and hence as an acceleration.
• What force is needed to keep an object moving in a circular path?

  A centripetal force is needed to keep an object moving in a circular path.
• What are some examples of objects moving in circular paths and the type of centripetal force involved?

  • A satellite orbiting Earth (gravitational force)
  • A car turning around a curve (frictional force)
  • A ball on a string being swung in a circle (tension force)
• What is the difference between mass and weight?

  Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.
• How does weight change with location?

  Weight changes with location due to variations in gravitational force.
• How do balanced and unbalanced forces affect motion differently?

  Balanced forces do not change motion, while unbalanced forces cause acceleration or deceleration.
• If an object is moving in a circular path, what type of force is acting on it?

  A centripetal force is acting on it.