Mr. Nye

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The Mans Jeopardy
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Learning Objectives (Big Ideas)

1. Analyze an objects motion and be able to
   determine distance, velocity, speed, or
   acceleration from a reference point.
2. Describe how the various balanced and unbalanced
   forces can have an effect on an objects motion.
3. Apply Newtons Laws to real world examples.
4. Analyze the methods by which machines make work
   easier.
5. Examine situations where kinetic energy is
   changed into potential energy (and vice-versa).

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RULES

1. There will be round robin play and all questions
   will be all-play.
2. The teams who answers correctly win the point
   value of the question.
3. There are no daily doubles available.

Lets play
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Work Machines

Motion
Forces
Energy
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
500
500
Final Jeopardy
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Motion for 100

• Which of the following describe the objects
  velocity a car going at 60 mph, a truck speeding
  at -80 mph, and/or a bike traveling at 15 mph
  South?
• The truck and the bike examples are velocities
  because they give the speed direction (negative
  South).

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Motion for 200

• Give an example of when an object has
  decelerated.
• Running then slowing down to walking
• Coming to a stop at a red light.
• Biking uphill.

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Motion for 300

• Describe an objects motion if all of the forces
  acting on the object are balanced the object is
  already in motion? What if the forces are
  unbalanced?
• Balanced The object will continue its current
  motion.
• Unbalanced Forces The object would change its
  motion (such as moving faster or slower or
  stopping)

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Motion for 400

• In terms of reference points, explain how you
  could be moving at 60 mph or 0 mph if you were in
  a car traveling down the road.
• According to the road or a stationary object on
  the side of the road, you are moving at 60 mph.
• However, if the reference point is the car
  itself, then you are not moving at all.

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Motion for 500

• Determine the objects average speed over 5
  hours from the distance-time graph below.
• 300 km/5 hours 60 km/h

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Forces for 100

• Whenever an object is moving on Earth, there
  will always be ________, which resists the
  objects motion in the opposite direction of the
  net force. Also, on any planet, there will also
  be _________ which pulls the object down towards
  the center of the planet.
• Friction
• Gravity

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Forces for 200

• Which object would have the greater inertia a
  large boulder or a pebble? Which one would have
  the greater momentum if they are going about the
  same velocity?
• Large boulder for both questions
• (more mass means more inertia and more momentum)

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Forces for 300

• More force is required to make an object
  ______________ faster or move from rest if it has
  a large ________. Hint- What affects force?
• Accelerate faster
• large Mass

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Forces for 400

• If two track field stars push with the same
  amount of force with their legs, which one would
  accelerate quicker the heavier runner or the
  lighter runner? Explain why.
• Lighter runner because less mass means a quicker
  acceleration if the force is constant.

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Forces for 500

• Markie Suzie conduct an experiment to
  determine how mass affects how quickly objects
  fall. They choose to drop various objects from
  the top of a 30 ft. roof. They both believe that
  heavier objects will fall faster. What is their
  hypothesis? How should they design the
  experiment? What is 1 constant? May give answer
  verbally.
• Hyp.- Heavier objects fall faster
• Design- Drop objects of different masses and
  measure their speed as they fall.
• Constants- Air resistance, height, dropped the
  same way, etc.

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Work Machines for 100

• Machines can make work easier by lowering the
  applied force, which means the __________ force
  is greater than the _______ force.
• Output force (usually the weight or load) is
  greater than the applied or input force.

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Work Machines for 200

• A door stopper is an example of a _________ (a
  type of simple machine), and it has a M.A.
  ________ than 1
• Wedge
• M.A. greater than 1

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Work Machines for 300

• Suppose the input force for an ax splitting wood
  is 45 N, what would be a possible output force?
• Any value greater than 45 N, but probably around
  90 N or more

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Work Machines for 400

• For both 1st class (where the fulcrum is closer
  to the load) and 2nd class levers, how does the
  load weight compare to the applied force?
• The load weight is greater than the applied force
  because both types of levers lower the applied
  force.

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Work Machines for 500

• Explain how a wheel and axle machine works in
  terms of the input vs. output force and input vs.
  output distance.
• The input force over the wheel travels a greater
  distance than the larger output force over the
  axle.

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Energy for 100

• Which of the following is an example of kinetic
  energy decreasing a ball rolling down a ramp, an
  object in free-fall, or a car going up a mountain
  road?
• Car going up the mountain road (slowing down)

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Energy for 200

• For the swinging of a pendulum, where is the PE
  the greatest and where is the KE the greatest?
  Draw a labeled diagram to answer this question.

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Energy for 300

• If a skier is going down a mountain, how do the
  PE and KE change? Explain your answer.
• PE decreases because the skier is closer to the
  ground and the KE increases because the skier is
  getting faster.

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Gravity

• If planets A and B are the same mass but planet
  A is twice as close to Earth as planet B, then
  which one will Earth have the greatest attraction
  for? Also, suppose planet C is the same distance
  from Earth as planet A, but is ¼ as heavy. Now
  which planet would Earth have the greatest
  gravitational attraction for?
• Planet A for both cases because it is closer than
  planet B, but heavier than planet C.