When can the conservation of mechanical energy equation be used?
Introduction to Mechanical Energy with Friction

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Physics, Science, Engineering
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11th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When mechanical energy is not conserved
When there is work done by applied forces
When there is no work done by friction or applied forces
When there is work done by friction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the equation for work done by friction?
Force of friction times velocity times cosine of the angle
Force of friction times displacement times cosine of the angle
Force of friction times time times cosine of the angle
Force of friction times displacement times sine of the angle
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a change in mechanical energy represent?
Initial mechanical energy minus final mechanical energy
Final mechanical energy minus initial mechanical energy
The sum of initial and final mechanical energy
The product of initial and final mechanical energy
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical angle between the force of friction and displacement?
360 degrees
180 degrees
90 degrees
0 degrees
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In what situation can the force of friction be in the same direction as the object's motion?
When the object is stationary
When the object is moving uphill
When the object is moving in a vacuum
When a hockey puck is accelerated on a moving block
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