Chapter 5 Review

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Chapter 5 Review

• Mr. Hauser

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Rules of the Game

• Working in TEAMS, you will be asked to answer
  questions from the assigned chapters.
• You have 30 seconds to write the answer down on
  the dry erase board.
• When the teacher says TIMES UP, a team leader
  will stand up and show the teacher their answer.

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Rules (Continued)

• Each correct answer is worth one point, unless
  otherwise stated.
• Teams can lose points for inappropriate conduct,
  comments, or cheating.
• The team with the most points at the end of the
  game wins!

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Question 1

• A force applied over a distance is called
  ____________.

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ANSWER

• Work

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Question 2

• What are the metric units used to measure Work?
  (Write out the word.)

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ANSWER

• Joules

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Question 3

• Energy of motion is called
• Potential
• Work
• Kinetic
• Chemical

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ANSWER

• Kinetic

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Question 4

• What are the metric units used to measure power?
  (Write out the word)

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ANSWER

• Watts

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Question 5

• A force of 45 Newtons acts on an object at an
  angle of 50 degrees above the horizontal pulling
  it 3 meters. How much work was done? (you must
  have the proper units with your answer)

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ANSWER

• 86.8 Joules

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Question 6

• The rate at which work is done is called ______.

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ANSWER

• Power

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Question 7

• Power is ________ related to time.
• A) directly
• B) inversely
• C) quadratically
• D) linearly

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ANSWER

• B) inversely

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Question 8

• When the force acting on an object is opposite
  the direction of motion of the object, _________
  work is done.

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ANSWER

• negative

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Question 9

• _________ is defined as the ability to cause
  change or the ability to do work.

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ANSWER

• Energy

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Question 10

• If an object doubles its mass, its potential
  energy will ________.
• be halved
• double
• quadruple
• be reduced to one fourth

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ANSWER

• B) double

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Question 11

• If an object doubles its speed its kinetic energy
  will...
• be halved.
• double.
• quadruple.
• be reduced to one fourth.

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ANSWER

• C) quadruple

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Question 12

• List five types of non-mechanical energy we
  discussed in class.

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ANSWER

• Nuclear (atomic), Thermal, Chemical, Electrical,
  Light (radiant)

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Question 13

• This is considered stored energy or energy of
  position.

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ANSWER

• Potential energy

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Question 14

• A bird is flying above the ground. What type or
  types of mechanical energy does it have? (be as
  specific as possible)

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ANSWER

• Gravitational potential energy and kinetic energy

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Question 15

• How much horsepower do you have if your mass is
  75 kg, and you can climb the steps that are 3.29
  meters high in a time of 2.3 seconds?

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ANSWER

• 1.4 horsepower

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Question 16

• How much work is done to lift a 45 kg weight up a
  distance of 6.2 meters at a constant velocity?

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ANSWER

• 2,734 Joules

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Question 17

• How much work must be done by a force to
  accelerate a 1800kg car from 4.5 m/s to 27 m/s?
  (show units)

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ANSWER

• 638,000 Joules

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Question 18

•  
• In the lab, we found the work done on the bow by
  pulling it back by finding the ________ under the
  graph of force vs. displacement.

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ANSWER

• area

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Question 19

• A rollercoaster starts from rest on top of its
  hill. It drops and moves through the bottom of
  the hill. What types of mechanical energy did
  the roller coaster have at the top and at the
  bottom? (Be as specific as possible)

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ANSWER

• Gravitational Potential Energy at the top and
  Kinetic Energy at the bottom

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Question 20

• Energy can neither be created nor destroyed but
  it can be converted from one form to another.
  This statement is called ______.

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ANSWER

• Law of Conservation of Energy

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Question 21

• Write the long form of the equation for the Law
  of Conservation of Energy.

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ANSWER

• KEf PEf KEi Pei (Wfriction)

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Question 22

• All of the energy lost in a machine due to
  friction ends up in the form of ________.

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ANSWER

• Heat

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Question 23

• The energy that you use to move around all day
  long indirectly comes from what?

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ANSWER

• The sun

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Question 24

• When a spring is stretched four times further
  than its relaxed position, by what factor does
  its elastic potential energy increase?

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ANSWER

• 16 times

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Question 25

• A skier moves over top of a hill at 5.4 m/s and
  then drops 6.4 m down its surface. The hill is
  frictionless. What is the velocity of the skier
  at the bottom of the hill?

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ANSWER

• 12.4 m/s

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Question 26

• A spring with with a spring constant of 890 N/m
  is compressed such that it has 6.4 Joules of
  elastic potential energy. How far was it
  compressed?

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ANSWER

• 0.12 meters

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Question 27

• An 4.5 kg model airplane slows from 9.3 m/s to
  rest with a force of 22 N. How far did it travel
  during while slowing down?

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ANSWER

• 8.8 meters

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FINAL QUESTION

• A roller coaster goes 14 m/s over its second
  hill, which is 22 meters high. It started from 3
  m/s on top of its first hill. How high was the
  first hill?

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ANSWER

• 31.5 meters