Forces Motion And Energy: Chapter 2, Forces In Motion

29 Questions | Total Attempts: 263

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Motion And Forces Quizzes & Trivia

Practice quiz for Holt Science and Technology: Forces Motion and Energy: Chapter 2, Forces in Motion


Questions and Answers
  • 1. 
    Which falls faster if there is no air resistance?
    • A. 

      Heavier objects

    • B. 

      Bigger objects

    • C. 

      All ojects fall at the same speed

  • 2. 
    • A. 

      Newton

    • B. 

      Galileo

    • C. 

      Aristotle

  • 3. 
    All objects accellerate toward the earth at __________.
    • A. 

      9.8 meters per second

    • B. 

      8.9 Meters per second per second

    • C. 

      9.8 meters per second per second

  • 4. 
    • A. 

      V = t - g so 10s - 9.8m/s/s = .2 m/s

    • B. 

      V = t /g so 10s/9.8m/s/s = 1.02 m/s

    • C. 

      V = t x g so 10s x 9.8m/s/s = 98 m/s

  • 5. 
    If you were to drop a feather and a marble right now, the marble will fall fall faster.  Why?
    • A. 

      Air resistance

    • B. 

      The marble is heavier

    • C. 

      The feather is from a bird and birds fly

  • 6. 
    Air resistance is a kind of _______.
    • A. 

      Sliding friction

    • B. 

      Fluid friction

    • C. 

      Rolling friction

  • 7. 
    How would you calculate the force acting on a falling object?
    • A. 

      The force of gravity multiplied by the force of air resistance

    • B. 

      The force of gravity divided by the force of air resistance

    • C. 

      The force of gravity minus the force of air resistance

  • 8. 
    define terminatl velocity
    • A. 

      When something falls at a constant rate because the downward force of gravity equals the upward force of air resistance

    • B. 

      the velocity of a train as it passes the terminal

    • C. 

      The velocity of an object after it has come to rest on the ground

  • 9. 
    What two factors determine the amount of air resistance.
    • A. 

      Size and mass

    • B. 

      Shape and mass

    • C. 

      Size and shape

  • 10. 
    Why does an astronaut appear to loat inside the spacecraft?
    • A. 

      The astronaut is weightless

    • B. 

      Both the astronaut and the spacecraft are in free fall.

    • C. 

      They are in outer space where there is no gravity

  • 11. 
    Define free fall.
    • A. 

      When gravity is pulling an object down and no other forces are acting on it.

    • B. 

      When something is falling out of an airplane

    • C. 

      When something is falling, but it is weightless

  • 12. 
    define orbit.
    • A. 

      When something is travelling in a straight path

    • B. 

      When something is traveling in a curved path

    • C. 

      When something is travelling in a circular or near circular path around something else.

  • 13. 
    What two motions combine to cause one object to orbit another?
    • A. 

      Constant forward motion and free fall

    • B. 

      Constant circular motion and free fall

    • C. 

      Constant forward motion and constant circular motion

  • 14. 
    • A. 

      When something is travelling in a circular or near circular path around something else.

    • B. 

      The vibration of a projectile

    • C. 

      The curved path an oject follows when it is thrown or propelled near the surface of the earth.

  • 15. 
    Projectile motion results from combining two motions.  What are they?
    • A. 

      Accelerating horizontal motion and constant vertical motion

    • B. 

      Constant horizontal motion and vertical motion accelerating because of gravity

    • C. 

      Free fall and accelerating horizontal motion

  • 16. 
    Which law is this:  The accelleration of an object depends on the mass of the object and the force applied.
    • A. 

      Newtons First Law of motion

    • B. 

      Newton's second law of motion

    • C. 

      Newton's third law of motion

  • 17. 
    Which law is this: Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
    • A. 

      Newtons First law of motion

    • B. 

      Newton's second law of motion

    • C. 

      Newton's third law of motion

  • 18. 
    How does a rocket engine work and which of Newton's laws of motion is involved.
    • A. 

      The rocket engine pushes gases downward so the gases push the rocket upward with an equal force. Newton's Third Law

    • B. 

      The gases flying out of the rocket engine push against the ground. Newton's Second law.

    • C. 

      Heat rises. Newton's First Law.

  • 19. 
    Which Law is this: An object at rest remains at rest and an object in motion remains in motion at a constant speed and in a straight line unless acted upon by an unbalanced force.
    • A. 

      Newton's first law of motion

    • B. 

      Newton's second law of Motion

    • C. 

      Newton's third law of motion

  • 20. 
    If you were to throw a ball right now, why wouldn't it travel in a straight line forever?
    • A. 

      Because unbalanced forces act on it.

    • B. 

      Because of gravity and air resistance.

    • C. 

      All of the above. Gravity and air resistance provide the unbalanced forces.

  • 21. 
    Define inertia.
    • A. 

      The tendancy of all objects to resist any change in motion.

    • B. 

      Change in speed over a period of time.

  • 22. 
    Between two objects, which will have more inertia?
    • A. 

      The one with less mass

    • B. 

      The one that is traveling faster

    • C. 

      The one with more mass

  • 23. 
    What determines how much an object will accellerate?
    • A. 

      The amount of force acting on the object

    • B. 

      The mass of the object

    • C. 

      Both the mass of the object and the force acting on it

  • 24. 
    How do you state Newton's second law mathematically?  (a = accelleration; m = mass; f = force)
    • A. 

      A = f x m

    • B. 

      A = f / m

    • C. 

      A = f + m

    • D. 

      A = f - m

  • 25. 
    What is a second way of stating newton's second law mathematically?
    • A. 

      F = m x a

    • B. 

      F = m - a

    • C. 

      F = m / a

  • 26. 
    Define momentum.
    • A. 

      A property of a moving object that depends upon its mass and velocity.

    • B. 

      The time it takes to stop a moving object

    • C. 

      Inertia

  • 27. 
    Which has more momentum:
    • A. 

      A 5 gram marble moving at 60 miles per hour

    • B. 

      A 10 gram marble moving at 60 miles per hour

    • C. 

      A 10 gram marble moving at 10 miles per hour

  • 28. 
    If one marble strikes another marble, some momentum wil be transfered from one to the other.  What will happen to their combined momentum.
    • A. 

      It will increase

    • B. 

      It will decrease

    • C. 

      It will stay the same

  • 29. 
    Which law do you use to answer the previous question?
    • A. 

      The law of the conservation of momentum

    • B. 

      Newton's first law of motion

    • C. 

      Newton's second law of motion