Newton’s first law of motion

• How can you apply Newton's first law?

  To moving and stationary objects
• What do Newton's Laws of Motion describe?

  The effects of forces on motion
• How many laws of motion are there?

  Three laws of motion
• What happens if the resultant force on a stationary object is zero?

  The object remains stationary
• What occurs if the resultant force on a moving object is zero?

  The object continues moving at the same velocity
• What does a balanced force on a stationary object indicate?

  The resultant force is zero
• What does it mean for an object to have no resultant force acting on it?

  Both speed and direction stay the same
• What is the resultant force when two equal forces act in opposite directions?

  Zero
• What happens to an object moving at a constant speed with no forces acting on it?

  It continues to move with the same velocity
• What is the driving force of a car moving at a constant speed?

  The engine's driving force
• What are resistive forces?

  Friction with air and road
• What happens when a resultant force acts on a stationary object?

  The object accelerates in the direction of the force
• What does a resultant force cause an object's speed to do?

  Change
• How can a resultant force affect an object's direction?

  It can change the object's direction
• What happens when a resultant force acts on an object moving at a constant speed?

  The object decelerates
• What does a resultant force acting upwards do to an object moving at constant speed?

  It causes the object to accelerate upwards
• What are the key points of Newton's first law of motion?

  • An object remains stationary if no resultant force acts on it.
  • An object continues moving at the same velocity if no resultant force acts on it.
  • A resultant force causes an object's speed or direction to change.
• What are the effects of balanced forces on stationary and moving objects?

  • Stationary object: Remains stationary.
  • Moving object: Continues moving at the same velocity.
• What are resistive forces and their effects on a moving car?

  • Resistive forces include air and road friction.
  • They balance the driving force when speed is constant.
• What is inertia

  The tendency of objects to continue in their state for the rest of uniform motion