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Chapter 5 Review

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Chapter 5 Review Mr. Hauser Question 16 How much work is done to lift a 45 kg weight up a distance of 6.2 meters at a constant velocity? 2,734 Joules Question 17 How ... – PowerPoint PPT presentation

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Title: Chapter 5 Review


1
Chapter 5 Review
  • Mr. Hauser

2
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.

3
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!

4
Question 1
  • A force applied over a distance is called
    ____________.

5
ANSWER
  • Work

6
Question 2
  • What are the metric units used to measure Work?
    (Write out the word.)

7
ANSWER
  • Joules

8
Question 3
  • Energy of motion is called
  • Potential
  • Work
  • Kinetic
  • Chemical

9
ANSWER
  • Kinetic

10
Question 4
  • What are the metric units used to measure power?
    (Write out the word)

11
ANSWER
  • Watts

12
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)

13
ANSWER
  • 86.8 Joules

14
Question 6
  • The rate at which work is done is called ______.

15
ANSWER
  • Power

16
Question 7
  • Power is ________ related to time.
  • A) directly
  • B) inversely
  • C) quadratically
  • D) linearly

17
ANSWER
  • B) inversely

18
Question 8
  • When the force acting on an object is opposite
    the direction of motion of the object, _________
    work is done.

19
ANSWER
  • negative

20
Question 9
  • _________ is defined as the ability to cause
    change or the ability to do work.

21
ANSWER
  • Energy

22
Question 10
  • If an object doubles its mass, its potential
    energy will ________.
  • be halved
  • double
  • quadruple
  • be reduced to one fourth

23
ANSWER
  • B) double

24
Question 11
  • If an object doubles its speed its kinetic energy
    will...
  • be halved.
  • double.
  • quadruple.
  • be reduced to one fourth.

25
ANSWER
  • C) quadruple

26
Question 12
  • List five types of non-mechanical energy we
    discussed in class.

27
ANSWER
  • Nuclear (atomic), Thermal, Chemical, Electrical,
    Light (radiant)

28
Question 13
  • This is considered stored energy or energy of
    position.

29
ANSWER
  • Potential energy

30
Question 14
  • A bird is flying above the ground. What type or
    types of mechanical energy does it have? (be as
    specific as possible)

31
ANSWER
  • Gravitational potential energy and kinetic energy

32
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?

33
ANSWER
  • 1.4 horsepower

34
Question 16
  • How much work is done to lift a 45 kg weight up a
    distance of 6.2 meters at a constant velocity?

35
ANSWER
  • 2,734 Joules

36
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)

37
ANSWER
  • 638,000 Joules

38
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.

39
 
ANSWER
  • area

40
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)

41
ANSWER
  • Gravitational Potential Energy at the top and
    Kinetic Energy at the bottom

42
Question 20
  • Energy can neither be created nor destroyed but
    it can be converted from one form to another.
    This statement is called ______.

43
ANSWER
  • Law of Conservation of Energy

44
Question 21
  • Write the long form of the equation for the Law
    of Conservation of Energy.

45
ANSWER
  • KEf PEf KEi Pei (Wfriction)

46
Question 22
  • All of the energy lost in a machine due to
    friction ends up in the form of ________.

47
ANSWER
  • Heat

48
Question 23
  • The energy that you use to move around all day
    long indirectly comes from what?

49
ANSWER
  • The sun

50
Question 24
  • When a spring is stretched four times further
    than its relaxed position, by what factor does
    its elastic potential energy increase?

51
ANSWER
  • 16 times

52
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?

53
ANSWER
  • 12.4 m/s

54
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?

55
ANSWER
  • 0.12 meters

56
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?

57
ANSWER
  • 8.8 meters

58
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?

59
ANSWER
  • 31.5 meters
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