Newton's 1st & 2nd Laws

• What are Isaac 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 occurs if a moving object has zero resultant force acting on it?

  It continues moving at the same velocity
• How does Newton's second law differ from the first law?

  It states that a non-zero force causes acceleration
• What does a non-zero resultant force indicate?

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

  In the direction of the larger 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 relate to velocity?

  Acceleration is the change in velocity over time
• Why is the moon considered to be accelerating even at constant speed?

  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 that represents Newton's second law?

  $F =$$m \cdot a$
• How do you calculate the resultant force if given two opposing forces?

  Subtract the smaller force from the larger
• 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 of an object to resist changes in motion
• How does an object's inertial mass relate to its velocity change?

  It measures how difficult it is to change velocity
• How do you find an object's inertial mass?

  Divide force by acceleration
• What does a large mass indicate about an object's inertia?

  It requires a large force to change velocity
• What happens to an object at rest according to Newton's first law?

  It will stay at rest unless acted on
• What happens to an object in motion according to Newton's first law?

  It will stay in motion unless acted on
• What is the relationship between force, mass, and acceleration?

  Force equals mass times acceleration
• How does inertia relate to Newton's first law?

  Inertia is the principle behind the first law
• What is the effect of a resultant force of zero on an object's motion?

  It does not change the object's motion
• If an object is moving left and a rightward force acts on it, what will happen?

  It may slow down or stop
• How does changing direction affect velocity?

  It changes velocity even if speed is constant
• What is the gravitational force's role in the moon's orbit?

  It pulls the moon towards the Earth
• What does a larger resultant force imply about acceleration?

  It results in greater acceleration
• How do you calculate acceleration from force and mass?

  Use $a =$$\frac{F}{m}$
• What does Newton's second law explain about force and motion?

  It explains how force affects an object's motion
• What is the relationship between mass and inertia?

  Greater mass means greater inertia
• How does inertia affect an object's motion when forces are applied?

  It resists changes to the object's motion
• How does Newton's first law relate to everyday experiences?

  It explains why seatbelts are necessary in cars
• What is the significance of Newton's laws in physics?

  They form the foundation of classical mechanics
• What is the effect of a resultant force on a moving object?

  It can change its speed or direction
• How does Newton's second law apply to real-world scenarios?

  It helps predict how objects will move under forces
• What role does acceleration play in understanding motion?

  It helps describe how motion changes over time
• Why is it important to understand inertia in physics?

  It helps explain why objects behave as they do
• What is the definition of acceleration?

  Change in velocity over time
• How does Newton's first law apply to objects in motion?

  They continue moving unless acted upon