Newton's First Law
Often referred to as the law of _____.
What is inertia?
State Newton's Second Law of Motion.
What is the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to is mass. (F = ma).
What is for every action, there is an equal and opposite reaction?
Give the difference between contact and non-contact forces.
What is contact forces require physical contact between objects (friction), while non-contact forces act at a distance (gravitational).
What is a graphical representation that shows all the forces acting on an object, depicted as arrows pointing in the direction of each force?
Explain how this law explains a book resting on a table.
What is an object at rest stays at rest until acted on by another force?
If a 10 kg object experiences a net force of 20 N, what is its acceleration?
What is the acceleration of the object equals the force divided by the mass, therefore,
a =F/m = 20/10 = 2 m/s^2
Give an example of action-reaction forces as described by Newton's Third Law.
What is jumping off a small boat; the person pushes down on the boat (action), and the boat moves backward while the person moves forward (reaction)?
Define gravitational force and give an example.
What is gravitational force is the attractive force between two masses; an example is the force that pulls an apple toward the Earth?
Explain how weight and normal force are represented in a free-body diagram.
What is weight is represented by an arrow pointing downward from the center of the object, while the normal force is represented by an arrow pointing upward?
Describe a real-world example of an object in motion that continues in motion according to Newton's First Law.
What is a ball rolling on a field and continuing until a force stops it?
What is mass is the amount of matter in an object, and acceleration is how quickly the velocity of the object changes. More mass means less acceleration for the same force?
Explain how the Third Law explains why a rocket moves upward when gases are expelled downward.
What is the gases expelled downward exert a force on the rocket, and in reaction the rocket is pushed upward?
Define friction and give the factors that affect its magnitude.
What is a force that opposes motion, and its magnitude is affected by the surface of texture and the normal force pressing the surfaces together?
Explain what a free-body diagram of a block resting on a flat surface would look like with all forces acting on it represented.
What is the diagram would show a block with a downward arrow for weight and an upward arrow for the normal force, both of equal length, indicating equilibrium?
Relate this law to an object moving at constant velocity.
How can graphical methods be used to demonstrate the relationship described in Newton's Second Law?
What is graphical methods can be used to plot force vs acceleration, demonstrating that a straight line can represent the proportional relationship?
Explain the context of the Third Law on swimming.
What is the swimmer pushing the water backward (action), while the water pushes the swimmer forward (reaction).
Explain the concept of tension force in a rope.
What is the pulling force transmitted through a rope or string when it is pulled tight by forces acting from opposite ends?
What is an object is in equilibrium if the sum of all forces acting on it is zero, which is shown in a force diagram where opposing forces balance each other?
What happens to an object moving in space with no external net force acting on it?
What is the object will continue moving indefinitely through space since there are no external forces in space to stop the object?
Discuss Newton's Second Law in sports, using a specific example.
What is a heavier player may require more force to achieve the same acceleration as a lighter player, affecting performance and strategy?
Given a situation where two cars collide, explain the forces at play using the Third Law.
What is both cars exert forces on each other that are equal, but in opposite direction, resulting in an exchange of momentum?
What is the gravitational force acting on an object is proportional to its mass; the larger the mass, the stronger the gravitational pull it experiences.
Explain how buoyant forces relate to an object's ability to float or sink.
What is buoyant forces act upward on an object submerged in fluid?