2013 Chapter 3 8th grade Science
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| Mechanics | show 🗑
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| show | Scalar quantities tell size OR magnitude of the thing measured
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| What does a vector quantity tell us? | show 🗑
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| show | Distance is scalar; displacement is vector
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| Which of these quantities is a vector quantity, Speed or velocity? | show 🗑
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| What are some other vector quantities? | show 🗑
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| Define Distance | show 🗑
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| Define Displacement | show 🗑
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| Define Speed | show 🗑
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| show | Distance and direction an object moves per unit of time
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| Average speed | show 🗑
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| show | Speed at any given moment in time like on your speedometer in the car
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| Constant speed | show 🗑
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| Acceleration | show 🗑
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| Deceleration | show 🗑
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| Define Force | show 🗑
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| show | When there is no unbalanced force on an object, objects at rest stay at rest and objects moving keep moving at the same speed in the same direction
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| State Newton’s Second Law of Motion | show 🗑
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| show | All objects fall at the same rate if there is little or no air resistance
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| show | 9.85 m/s2
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| show | Mass is the amount of matter in something and weight is the pull of gravity. Mass is measure on a balance in g or kg and weight is measured on a spring scale in N. Mass cannot change or be zero and weight can.
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| What is momentum? | show 🗑
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| How do we calculate it? | show 🗑
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| show | F = m* a
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| Be able to calculate using the formula for momentum | show 🗑
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| show | Force times time equals impulse
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| show | Impulse is equal to the change in momentum.
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| show | When momentum changes quickly, Force can be minimized by extending the time it acts. Air bags, seat belts, and bumpers which crumple all work to allow extra time between the Force and its impact in a collision.
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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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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:
judi829
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