7th grade physics
Help!
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| What is force? | A push or pull
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| What is an unbalanced force? | Not equal, causes an object to move.
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| What is a balanced force? | Equal, the same strength, an object doesn't move
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| What is net force? | All forces acting on an object, total forces
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| What is Inertia/newton's first law of motion? | an object in motion stays in motion , an object at rest stays at rest unless acted upon by an unbalanced force
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| What is newton's second law of motion? | force=mass x acceleration
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| What is friction? | A force that opposes motion when two surfaces make contact
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| What is gravity? | The force that pulls objects towards each other
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| What is air resistance? | The fluid friction experienced by objects falling through the air
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| What is momentum? | The product of an object's mass and velocity
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| What is newtons third law of motion? | for every action there is an equal and opposite reaction
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| What two factures ddetermine the frictional force between two surfaces? | 1. The pressure pushing the objects together
2. How uneven the two surfaces of the objects are
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| How are mass and weight different? | Mass is how much matter is in an object and weight is the force of gravity on an object
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| What are the four types of friction? | fluid, static, rolling, and sliding
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| What is the law of universal gravitation? | It states that any two bodies in the universe attract eachother due to their gravitational pull. This was created by Isaac Newton
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| what is the relationship between mass and momentum? | The greater the mass, the greater the momentum.
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| What is the relationship between velocity and momentum? | The greater the velocity, the greater the momentum.
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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.
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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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Created by:
ooomber
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