Transcript WorkEnergyReview

Chapter 5 Review
Mr. Hauser
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 TIME’S UP, a
team leader will stand up and show the
teacher their answer.
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!
Question 1
A force applied over a distance is
called ____________.
Work
Question 2
What are the metric units
used to measure Work?
(Write out the word.)
Joules
Question 3
Energy of motion is called
A)
B)
C)
D)
Potential
Work
Kinetic
Chemical
Kinetic
Question 4
What are the metric units used to
measure power? (Write out the
word)
Watts
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)
86.8 Joules
Question 6
Power is ________ related to
time.
A) Directly
B) Inversely
C) Quadratically
D) Linearly
B) Inversely
Question 7
When the force acting on an object is
opposite the direction of motion of
the object, _________ work is
done.
negative
Question 8
_________ is defined as the ability to
cause change or the ability to do
work.
Energy
Question 9
If an object doubles its mass, its
potential energy will
________.
A) be halved
B) double
C) quadruple
D) be reduced to one fourth
B) double
Question 10
If an object doubles its
velocity its kinetic energy
________.
A)be halved
B) double
C) quadruple
D) be reduced to one fourth
C) quadruple
Question 11
How much power 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?
1.04X103 Watts
Question 12
How much work must be done
to accelerate a 1800kg car
from 4.5 m/s to 27 m/s? (show
units)
638,000 Joules
Question 13
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.
area
Question 14
A rollercoaster is moving halfway
down its hill. What type or types of
mechanical energy does it have?
(Be as specific as possible)
Kinetic Energy and
Gravitational Potential
Energy
Question 15
Energy can neither be
created nor destroyed but
it can be converted from
one form to another. This
statement is called ______.
Law of Conservation of
Energy
Question 16
Write the long form of the equation for the
Law of Conservation of Energy.
KEf + PEf = KEi + PEi + Wncf
Question 17
A skier cruises over a hill at 5.4
m/s. The hill is 6.4 m high. The
hill is frictionless. What is the
velocity of the skier at the
bottom of the hill?
12.4 m/s
FINAL
QUESTION
A roller coaster goes 18 m/s over
its second hill which is 22
meters high. The track
efficiency of the coaster is 82%.
How fast will it be at the
bottom of the hill?
24.9 m/s