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Energy, Force, and Motion

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the velocity of a falling body increases by 10 m/s every second. ... 9) On Halloween, you take a glow stick, crack the solution and mix it until it glows. ... – PowerPoint PPT presentation

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Title: Energy, Force, and Motion


1
Energy, Force, and Motion
  • Physical Science
  • Practice EOCT Quiz

2
Energy, Force, and Motion
  • 1) If an 80-kg person is traveling at 2 m/s, what
    is their momentum?
  • A) 40 kgm/s
  • B) 160 kgm/s
  • C) 16 kgm/s
  • D) .25 kgm/s

3
Energy, Force, and Motion
  • 2) Assuming the downward direction to be
    positive, the acceleration of gravity is about 10
    m/s2. This means that ...
  • the velocity of a falling body increases by 10
    m/s every second.
  • the velocity of a falling body increases by 1 m/s
    every 10 seconds.
  • the distance of a falling body increases by 10 m
    every second.
  • the time of a falling body increases is reduced
    by one second every 10 m.

4
Energy, Force, and Motion
  • 3) Raising 100. grams of water from 40. to 60.
    degrees C requires the addition of
  • A) 2400 cal
  • B) 1500 cal
  • C) 2000 cal
  • D) Not enough information given

5
Energy, Force, and Motion
  • 4) The kind of energy released when atoms are
    rearranged to form new bonds is called
    _______________.
  • A) mechanical
  • B) electromagnetic
  • C) chemical
  • D) nuclear

6
Energy, Force, and Motion
  • 5) Calculate the amount of work done if you use a
    100N force to push a 50kg box 5m across the
    kitchen floor.
  • A) 250 J
  • B) 500 J
  • C) 5000 J
  • D) 50,000 J

7
Energy, Force, and Motion
  • 6) Identify the unit of mass in the following
    choices.
  • A) meters
  • B) milliliters
  • C) kiloseconds
  • D) centigrams

8
Energy, Force, and Motion
  • 7) If Susan put 50 J of work into a machine and
    got 25 J of output work, how efficient was her
    machine?
  • A) 300
  • B) 100
  • C) 25
  • D) 50

9
Energy, Force, and Motion
  • 8) An icepack contains ammonium nitrate. When
    this is dissolved in water it gets considerably
    colder. This is an example of heat energy being
    converted into _______________energy.
  • A) light
  • B) mechanical
  • C) chemical
  • D) nuclear

10
Energy, Force, and Motion
  • 9) On Halloween, you take a glow stick, crack the
    solution and mix it until it glows. This is an
    example of light energy being created from
    ___________________ energy.
  • A) solution
  • B) mechanical
  • C) thermal
  • D) chemical

11
Energy, Force, and Motion
  • 10) Two astronauts are playing catch with a ball
    in space. The first astronaut throws the ball,
    and ___________.
  • A) The ball doesnt move but the astronaut does.
  • B) The ball doesnt move and neither does the
    astronaut.
  • C) The ball moves, but the astronaut doesnt.
  • D) The ball moves and so does the astronaut
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