first & second

• What are the two laws of motion discussed in the video?

  Newton's first and second laws
• 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 the resultant force is zero?

  It remains stationary
• What occurs if a moving object's resultant force is zero?

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

  It causes the object to accelerate
• If a particle has unbalanced forces acting on it, what will happen?

  It will accelerate in the direction of the resultant force
• What are the five possible outcomes of acceleration for a particle?

  Start moving, speed up, slow down, stop, change direction
• How is acceleration defined in terms of velocity and time?

  Change in velocity divided by change in time
• Why does the moon accelerate even with constant speed in its orbit?

  Its direction is constantly changing
• What force acts on the moon to keep it in orbit?

  The gravitational pull of the Earth
• What does the size of the resultant force relate to in Newton's second law?

  It is directly proportional to the acceleration
• What is the equation for Newton's second law?

  F = m * a
• What is inertia?

  The tendency for motion to remain unchanged
• If a particle has a mass of 0.25 kg and experiences a resultant force of 12 N, what is its acceleration?

  $48 \text{ m/s}^2$
• How does inertia relate to Newton's first law?

  It reflects the law's principle of unchanged motion
• How is an object's 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 is the conclusion of the video?

  Summary of Newton's laws and inertia