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