CH 1: Newton's first, second and third laws of motion
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Questions and Answers

What is the main factor that dictates the acceleration of the elevator after accounting for gravitational pull?

  • Normal force
  • Applied force
  • Frictional force
  • Net force (correct)

    • According to Newton's Third Law of Motion, what happens for every action?

  • The force disappears
  • There is no reaction
  • There is an equal and opposite reaction (correct)
  • The force doubles

    • In action-reaction pairs, what is a common example of a reaction to a rocket's propulsion?

  • The rocket spinning
  • The rocket moving upwards (correct)
  • The rocket moving downwards
  • The rocket staying still in the air

    • Why do action-reaction pairs not cancel out according to the text?

    <p>They act on different objects</p> Signup and view all the answers

    What is the first step in problem-solving with Newton’s Laws approach to Newtonian problems?

    <p>Identify forces</p> Signup and view all the answers

    What type of diagram should be drawn to visualize forces in problem-solving with Newton’s Laws?

    <p>Free-body diagrams</p> Signup and view all the answers

    What should be applied to set up equations based on free-body diagrams in Newtonian problems?

    <p>Newton's second law</p> Signup and view all the answers

    When solving for unknown quantities like acceleration or tension, what should be used as a guide according to the text?

    <p>Equations from free-body diagrams</p> Signup and view all the answers

    What should be ensured when using Newton's laws in systems with multiple objects?

    <p>Action-reaction pairs are identified and correctly applied</p> Signup and view all the answers

    What type of motion should be considered when analyzing forces in objects moving vertically?

    <p>Vertical motion</p> Signup and view all the answers

    What is Newton's first law of motion also known as?

    <p>The law of inertia</p> Signup and view all the answers

    According to Newton's second law of motion, what is the acceleration of an object directly proportional to?

    <p>The net force acting on it</p> Signup and view all the answers

    Which of the following scenarios illustrates Newton's second law of motion?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of seatbelts in vehicles according to Newton's first law of motion?

    <p>To provide a force to decelerate passengers safely during a sudden stop</p> Signup and view all the answers

    What is the mathematical equation for Newton's second law of motion?

    <p>F = ma</p> Signup and view all the answers

    Which of the following is NOT an example of Newton's second law of motion?

    <p>A satellite orbiting the Earth in a circular motion</p> Signup and view all the answers

    What is the inverse relationship described in Newton's second law of motion?

    <p>The acceleration is inversely proportional to the mass</p> Signup and view all the answers

    What is the main principle behind Newton's first law of motion?

    <p>Both A and B</p> Signup and view all the answers

    Which of the following scenarios does NOT illustrate Newton's first law of motion?

    <p>A car skidding on a wet road after braking</p> Signup and view all the answers

    What is the significance of the net force in Newton's second law of motion?

    <p>It determines the acceleration of the object</p> Signup and view all the answers

    What is the importance of drawing free-body diagrams in problem-solving with Newton's Laws?

    <p>To identify all forces acting on the object(s)</p> Signup and view all the answers

    In the context of Newton's Third Law, what happens when a swimmer pushes against water and moves forward?

    <p>The water pushes the swimmer forward</p> Signup and view all the answers

    When solving problems involving multiple objects, what should be checked with regards to Newton's Third Law?

    <p>Ensure action-reaction pairs are identified and correctly applied</p> Signup and view all the answers

    What characteristic differentiates action-reaction pairs according to Newton's laws?

    <p>They act on different objects and are opposite in direction</p> Signup and view all the answers

    What is the primary purpose of applying Newton's second law to set up equations based on free-body diagrams?

    <p>To identify all forces acting on the object(s)</p> Signup and view all the answers

    In the context of practical applications, how do Newton's laws contribute to space exploration?

    <p>By enabling precise calculations for launch, orbit, and landing</p> Signup and view all the answers

    What is one way in which Newton's laws are applied in engineering projects?

    <p>By designing structures that can withstand forces</p> Signup and view all the answers

    When analyzing forces on objects moving vertically, which forces should be considered?

    <p>All forces including gravity, normal force, and tension</p> Signup and view all the answers

    What step should be taken first in problem-solving with Newton's Laws approach to Newtonian problems?

    <p>Draw free-body diagrams</p> Signup and view all the answers

    What should be ensured about action-reaction pairs according to Newton's laws?

    <p>They are identified correctly and applied appropriately</p> Signup and view all the answers

    What concept explains why passengers in a car continue to move forward at the car's original speed during a sudden stop?

    <p>Inertia</p> Signup and view all the answers

    In Newton's Second Law of Motion, what is acceleration proportional to?

    <p>Mass</p> Signup and view all the answers

    Which scenario illustrates Newton's First Law of Motion?

    <p>A book resting on a table</p> Signup and view all the answers

    What force is crucial in decelerating passengers safely in a car during a sudden stop?

    <p>Frictional Force</p> Signup and view all the answers

    On an inclined plane, what factor influences the acceleration of objects like a car rolling downhill?

    <p>Gravitational Force</p> Signup and view all the answers

    What law explains why elevators accelerate either upwards or downwards?

    <p>Newton's Second Law of Motion</p> Signup and view all the answers

    Which term represents the resistance a hockey puck sliding on ice encounters that affects its acceleration?

    <p>Frictional Force</p> Signup and view all the answers

    What is the relation between the net force acting on an object and its acceleration as per Newton's Second Law?

    <p>$F = ma$</p> Signup and view all the answers

    What is the primary characteristic used to calculate acceleration for objects on inclined planes?

    <p>Slope</p> Signup and view all the answers

    What concept is showcased when a car rolls downhill on an inclined plane?

    <p>Friction</p> Signup and view all the answers

    What should be the first step taken to solve problems involving Newton's laws of motion?

    <p>Identifying forces</p> Signup and view all the answers

    In Newton's laws, what characteristic ensures that action-reaction pairs do not cancel out?

    <p>They act on different objects</p> Signup and view all the answers

    Which of the following is a crucial factor when analyzing forces on objects moving vertically?

    <p>Gravitational force and normal force</p> Signup and view all the answers

    What is the primary reason behind the design of car safety mechanisms like airbags and crumple zones?

    <p>To reduce impact forces</p> Signup and view all the answers

    Which force is crucial for decelerating passengers safely in a car during a sudden stop?

    <p>Frictional force</p> Signup and view all the answers

    In problem-solving with Newton's laws, what should be done after drawing free-body diagrams?

    <p>Apply equations of motion</p> Signup and view all the answers

    What is the main factor that determines the acceleration of elevators after accounting for gravitational pull?

    <p>&quot;Net force&quot;</p> Signup and view all the answers

    When solving problems involving multiple objects, what needs to be ensured regarding Newton's Third Law?

    <p>&quot;Action-reaction pairs are identified and correctly applied&quot;</p> Signup and view all the answers

    "Net force" in Newton's second law is directly related to which characteristic in terms of its effect on acceleration?

    <p>&quot;Proportional relationship&quot;</p> Signup and view all the answers

    "Practical applications" of Newton's laws in engineering projects primarily focus on which aspect?

    <p>&quot;Design optimization&quot;</p> Signup and view all the answers

    In the context of seatbelts and inertia, what purpose does the seatbelt serve?

    <p>Maintain the passengers' original speed</p> Signup and view all the answers

    When a hockey puck slides on ice, what factor directly affects its acceleration?

    <p>The net force applied to it</p> Signup and view all the answers

    What happens to objects on inclined planes like cars rolling downhill according to Newton's second law?

    <p>They experience components of gravitational force causing acceleration</p> Signup and view all the answers

    How is acceleration related to mass and net force according to Newton's second law?

    <p>Acceleration is directly proportional to mass and net force</p> Signup and view all the answers

    Which scenario best exemplifies Newton's Second Law of Motion?

    <p>A rocket launching into space</p> Signup and view all the answers

    What role does friction play in the motion of objects on horizontal planes according to Newton's second law?

    <p>Friction causes deceleration</p> Signup and view all the answers

    How does Newton's First Law of Motion relate to passengers in an accelerating elevator?

    <p>Passengers continue moving at their original speed</p> Signup and view all the answers

    When a car accelerates downwards on an inclined plane, what forces contribute to its motion?

    <p>'frictional forces'</p> Signup and view all the answers

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