Summary: Physics 1500

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• Chapters 2-7

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• What two classes of motion did Aristotle advocate?-Natural motion and violent motion-Earthly motion and heavenly motion-Propelled motion and passive motion-Vertical motion and horizontal motion

  Natural motion and violent motion

• How does Newton's first law of motion relate to Galileo's concept of inertia?-Newton refined Galileo's concept of inertia and made it his first law of motion.-Newton replaced Galileo's concept of inertia with his three laws of motion.-Newton expressed Galileo's concept of inertia with the inertia equation.-Newton's first law of motion refuted Galileo's concept of inertia.

  Newton refined Galileo's concept of inertia and made it his first law of motion.

• What type of path does a moving object follow in the absence of a force? -It moves in a straight line and eventually slows to a stop.-It follows a parabolic trajectory in the absence of a force.-It follows a circular path in the absence of a force.-It continues to move in a straight line at a constant speed.

   It continues to move in a straight line at a constant speed.

• What is the net force when a pair of 5-N forces simultaneously act in the same direction on an object?-0 N-7.5 N-5 N-10 N

  10 N

• Consider a book that weighs 15 N at rest on a flat table. How many newtons of support force does the table exert on the book?-15 newtons down-30 newtons up-15 newtons up-0 newtons

  15 newtons up

• A pair of 10-N vectors at right angles to each other has a resultant of about-20 N. -10 N. -14 N.-none of the above

  14 N.

• If you toss a coin straight upward while in a train moving at constant velocity, the coin will land-as if you were at rest.-in front of you.-in back of you.

  as if you were at rest.

• Earth continually moves about 30 km/s through space, which means the wall you stand next to also is moving at 30 km/s. When you jump vertically the wall doesn't slam into you because-the speeds of you and Earth cancel out.-motion of the Sun counteracts your motion.-your upward motion is small compared with Earth's speed.-you're moving horizontally just as fast as the wall.

  you're moving horizontally just as fast as the wall.

• What kind of speed is registered by an automobile speedometer?-Maximum speed-Instantaneous speed-Average speed-Minimum speed

  Instantaneous speed

• If a car is moving at 90 km/h and it rounds a corner, also at 90 km/h, does it maintain a constant speed? A constant velocity?-It maintains a constant speed and a constant velocity.-It maintains a constant speed, but does not maintain a constant velocity.-It maintains a constant velocity, but not a constant speed.-It does not maintain a constant speed or a constant velocity.

  It maintains a constant speed, but does not maintain a constant velocity.