Systems in Action Chapter 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Mechanical System | is a group of physical parts that interact with each other
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| Force | is a push or pull that acts on an object
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| Contact Force | must make contact/touch the object to push or pull
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| Friction | is a force that opposes that relative motion of an object
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| Action-at-a-distance | can push and pull an object without contact
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| Gravity | is the attraction between 2 objects due to there mass the amount of attraction depend on each item's mass
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| Mass | is the amount of matter in an object
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| Weight | is the amount of force on an object due to gravity
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| Spring Scale | shows the Weight of an object in Newtons
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| Work | is the amount of effort spent where a force causes an object to move a distance
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| Energy | is defined as the ability to work
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| Kinetic Energy | when an object is moving, the energy it has is Kinetic Energy
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| Potential Energy | any energy that is stored is Potential Energy
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| Gravitational Potential Energy | the Potential Energy of an object that is able to fall is Gravitational Potential Energy
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| Machine | is any mechanical system that reduces the force required to accomplish work
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| Input Force(Fin) | the force that is applied to the machine
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| Output Force(Fout) | the force that the machine applies to an object
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| Mechanical Advantages | the amount by which a machine can multiply an Input Force
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| Ideal Mechanical Advantages | the Mechanical Advantage of a machine that has no friction
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| Thermal Energy | is Energy created by heat
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| When Work is Missing... | Nxm=N/1 x m/1
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| When Force is Missing... | N=Nxm/1 x 1/m
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| When Distance is Missing... | m=Nxm/1 x 1/N
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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