Newtons first and second law

• What are Newton's first and second laws of motion about?

  They describe motion and forces acting on objects
• What does Newton's first law state about resultant force?

  A resultant force is needed to change motion
• What happens to a stationary object if no resultant force acts on it?

  It will remain stationary
• What happens to a moving object if no resultant force acts on it?

  It will continue moving at the same velocity
• What does Newton's second law state about non-zero resultant force?

  It causes an object to accelerate
• What does non-zero mean in the context of forces?

  Anything other than zero
• If a particle has unbalanced forces acting on it, what direction will it accelerate?

  In the direction of the resultant force
• What can happen to an object when it accelerates to the right?

  It can start moving, speed up, or change direction
• How does acceleration affect an object moving to the left when a rightward force is applied?

  It can slow down or stop the object
• What is acceleration defined as?

  Change in velocity divided by change in time
• Why is the moon considered to be accelerating even with constant speed?

  Its direction is constantly changing
• What causes the moon to orbit the Earth?

  The Earth's gravitational pull on the moon
• How is the size of the resultant force related to acceleration?

  It is directly proportional to the acceleration
• What is the equation that relates force, mass, and acceleration?

  F = m * a
• If a particle has a mass of 0.25 kg and experiences a resultant force of 12 N, what is its acceleration?

  $48 \text{ m/s}^2$
• What is inertia?

  The tendency for motion to remain unchanged
• How does inertia relate to Newton's first law?

  It reflects the law's principle about motion
• How is inertial mass defined?

  It measures difficulty in changing velocity
• How do you calculate inertial mass?

  By dividing force by acceleration
• What does a large mass indicate about inertia?

  It requires a large force to change velocity
• What happens to acceleration if the resultant force is doubled?

  It also doubles
• What is the relationship between mass and inertia?

  Greater mass means greater inertia
• How does Newton's second law apply to different masses?

  Different masses require different forces for acceleration
• What are the key concepts of Newton's first and second laws of motion?

  • First Law: Resultant force needed to change motion
  • Second Law: Non-zero resultant force causes acceleration
  • Inertia: Tendency to maintain current motion
• What are the effects of unbalanced forces on an object's motion?

  • Stationary object: Starts moving
  • Moving object: Speeds up or slows down
  • Change in direction: Acceleration occurs without speed change
• How does circular motion relate to acceleration?

  • Constant speed with changing direction
  • Acceleration occurs due to direction change
  • Example: Moon's orbit around Earth
• What is the significance of the equation F = m * a?

  • Relates force, mass, and acceleration
  • Directly proportional relationship
  • Used to calculate acceleration from force and mass
• What is the relationship between inertia and mass?

  • Larger mass = greater inertia
  • More force needed to change velocity
  • Inertia reflects Newton's first law