Download Conservation of Energy Worksheet

Conservation of Energy
Purpose:
 define energy
 identify forms of energy
 recognize energy cannot be created or destroyed
 know that the total energy of a closed system cannot change
 if work is done the energy of the object can change
1)
2)
3)
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6)
Work is done when a force is applied to an object over a [ time / displacement / velocity ]
When work is done on an object the amount of energy it has [ remains the same / changes ]
An object that is moving has energy. This energy is called [ kinetic / potential / nuclear ]
An object lifted away from the earth has energy. This energy is called [kinetic / potential / nuclear]
A box is resting on a frictionless floor. This box [ has no energy / has energy ]
A horizontal force is applied to a box resting on a frictionless floor. (circle all that apply) The box
a) Accelerates
b) Moves
c) Is displaced
d) Is experiencing work
e) Gains energy
7) When a force is applied to the box it [ gains / loses / maintains ] energy. Energy [must / must not] be
conserved. Where does the energy come from?
8) The force, on the box on a frictionless floor, is removed. (circle all that apply) The box will
a) Slow down
b) Speed up
c) Maintain constant velocity
d) Experience work
e) Have energy
9) The box slides onto a rough surface. Now, there [ will / will not ] be a frictional force directed [ forward /
backward / upward ] on the box. (circle all that apply) The box will
a) Slow down
b) Speed up
c) Maintain constant velocity
d) Experience work
e) Gain energy
f) Lose energy
10) When the box slows down due to friction work [ is / is not ] being done on the box.
11) When the box slows down due to friction it [ will / will not ] lose energy. Energy [must / must not] be
conserved. Where does the lost energy go?
12) After the box stops completely, it is lifted up with a force greater than its weight. The box
a) Accelerates
b) Moves
c) Is displaced
d) Is experiencing work
e) Gains energy
13) When a force is applied to the box it [ gains / loses / maintains ] energy. Energy [must / must not] be
conserved. Where does the energy come from?
14) The lifting force is removed and the box begins to fall. The box
a) Accelerates
b) Moves
c) Is displaced
d) Is experiencing work
e) Gains energy
f) Loses energy
Physics
Conservation of Energy (pink)
edited4/30/2017
Make bar graphs (like in your book) to indicate the amount of energy each object has. Use red to show
potential energy, blue to show kinetic energy, and black to show total energy.
Sketch the situation
what type of energy is present
BAR graph
Box resting on the floor.
TME
KE
PE
W
TME
KE
PE
W
TME
KE
PE
W
TME
KE
PE
W
TME
KE
PE
W
TME
KE
PE
W
TME
KE
PE
W
Fork lift raises box a little then
stops.
Fork lift raises box higher and
stops.
Box falls – at first moment its
unsupported.
Box falling – half way down.
Box falling – as it hits the
ground.
Box at rest on the ground.
Physics
Conservation of Energy (pink)
edited4/30/2017
Physics
Conservation of Energy (pink)
edited4/30/2017