caleb's science 14 study guide

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caleb1
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252396
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caleb's science 14 study guide
Updated:
2013-12-11 16:20:49
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caleb science
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science
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  1. rate an object's positon changes over time at any momment
    speed
  2. rate of speed and direction of a moving object
    velocity
  3. measurement of the force of gravity between an object and earth
    weight
  4. a book resting on a table demonstrates ________ _______ because the structural strength of the table balances the gravitational force.
    balanced forces
  5. rate of change in an object's velocity over time
    acceleration
  6. the measurable or observable push or pull action on an object
    force
  7. objects either remain at rest or in motion unless acted on by an external force
    inertia
  8. the force that opposes motion
    friction
  9. operation that produces work
    action
  10. Objects stay at rest or stay in motion unless a force causes objects to move or to stop moving
    Examples: A book sits on a table. A car cannot drive through a wall.
    Newton's 1st Law of Motion
  11. The greater the mass of an object the more force that is needed to move the object. Example: Kicking a ball. Kicking a wall.
    Newton's 2nd Law of Motion
  12. Every force creates an equal but opposite force. Example: A ball bounces. A rocket fires.
    Newton's 3rd Law of Motion
  13. Every object is attracted to every other object. The greater the resultant mass of two objects the greater the attraction; while the greater the separation of the objects, the lesser the attraction. Example: A person on the Earth. A person on the Moon.
    Newton's Law of Gravitation
  14. increasing velocity over time
    acceleration
  15. decreasing velocity over time
    deceleration
  16. Motion Law 2 states the greater the mass of an object the more force that is needed to move it. What formula is used to describe this?
    Use "a", "F" for force and "m" mass.
    What is "a"?
    a = F/m (acceleration)
  17. For Caleb's punishment, he must push a cart of Russet potatoes, with a mass of 10 kg. The potato cart rolls when Caleb presses with 20 N force. What is the acceleration of the rolling cart of Russets?
    using a(cceleration) = F(orce)/ m(ass); a(cceleration) = 20 Newton/ 10 kilos or an acceleration rate of: 2 meters per second, per second
  18. Speed and velocity both measure distance and time. What additional measurement does velocity track that speed does not?
    direction
  19. What are the ways in which an object can change acceleration?
    • There can be a change in mass. (A rocket ship jettisons its boosters.)
    • There can be a change in force. (The secondary rocket engines are engaged.)
  20. Newton's 3rd Law of Motion
    Every force creates an equal but opposite force. Example: A ball bounces. A rocket fires.
  21. Newton's 2nd Law of Motion
    The greater the mass of an object the more force that is needed to move the object. Example: Kicking a ball. Kicking a wall.
  22. Newton's 1st Law of Motion
    Objects stay at rest or stay in motion unless a force causes objects to move or to stop moving Examples: A book sits on a table. A car cannot drive through a wall.

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