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Published byRoberta Day Modified over 4 years ago

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**Reference Point Scalar Vector Position Distance Displacement Speed**

Vocabulary to Know! Reference Point Scalar Vector Position Distance Displacement Speed Average Speed

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Reference Point Def: a point that all motion will be measured relative to the Starting Point This is the starting point.

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**Two Types of Units ____________:**

Unit includes only objects magnitude (numerical value) Examples:____________________ Unit includes magnitude and direction Example: going 100 mph to the East Example:_____________________________________________________

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**Two Types of Units Scalar:**

Unit includes only objects magnitude (numerical value) Example: speed, distance Vector: Unit includes magnitude and direction Example: going 100 mph to the East Example: Velocity, acceleration, force, displacement,

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Position Def:____________________________________________________________ Symbol =_____ Unit = _______ Scalar or Vector? Use the position vs time graph to calculate the speed of the bug using s=d/t_______________

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Position Def: a point some distance and direction from my reference point Symbol = x Unit = meters (m) Scalar Use the position vs time graph to calculate the speed of the bug using s=d/t_______________

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Distance Def:_______________________________________________________________ Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my distance? ?_______ miles to Dallas ?_______miles from Dallas Total miles driven (distance)?___________

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**Distance Def: refers to the total distance traveled**

Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my distance? ?_______ miles to Dallas ?_______miles from Dallas Total miles driven (distance)?___________

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**(Δx = xfinal – xinitial) =___________ – __________**

Displacement Def:_____________________________ (Δx = xfinal – xinitial) =___________ – __________ Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my displacement? Start point = ________ End point = _________ Displacement=____________

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**(Δx = xfinal – xinitial)**

Displacement Def: Refers to the change in position (Δx = xfinal – xinitial) Finish pt – start pt Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my displacement? Displacement would be zero Start point = Houston End point = Houston

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**Distance vs. Displacement**

Scalar or Vector Unit:________ Formula: ____________Used to find: _________ Symbol:_____ Displacement Scalar or Vector Unit:_________ Formula: _____________ Used to find: ___________ Symbol:______

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**Distance vs. Displacement**

Scalar quantity Unit: m, km Total distance traveled Used to find Speed Symbol: d Displacement Vector quantity Unit: m, km Δx = xfinal – xinitial Used to find Velocity Symbol: Δx

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**Distance vs. Time Graphs**

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Speed Def:_______________________________________________________________ Scalar or Vector Quantity? Unit:______________________ Slope of the distance vs. time graph Can be read directly off a speed vs. time graph Symbol:____

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Speed Def: How fast you change position (distance traveled per unit time) Scalar Quantity Unit: meters per second (m/s) Slope of the distance vs. time graph Can be read directly off a speed vs. time graph Symbol: s

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**What is the average speed of object in graph?**

Def:______________________________ Scalar or Vector? Unit: ________ Symbol: _______ What is the average speed of object in graph? Use Rise over run __________________

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**Average Speed Def: total distance divided by total time**

Scalar quantity Unit: m/s Symbol: s What is the average Speed? Rise over run 2m/4sec = .5 m/sec

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**What is the speed of Light??**

The sun is ___________km from the Earth or _________ miles It takes light _____seconds to travel from the Sun to the Earth in the vacuum of outer space. What is the speed of light?? S =______________ Memorize this number!

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**What is the speed of Light??**

The sun is 150,000,000 km from the Earth or 93,000,000 miles It takes light 500 seconds to travel from the Sun to the Earth in the vacuum of outer space. What is the speed of light?? S = 300,000 km/s Memorize this number!

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**__________velocity _________velocity _________ velocity**

Slope Determines Velocity! Describe the motion in the following graphs based on slope using: “lesser”, “zero”, “greater” __________velocity _________velocity _________ velocity

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**Faster velocity Slower velocity NO (zer0) velocity Slope Determines**

Describe the motion in the following graphs based on slope using: “lesser”, “zero”, “greater” Faster velocity Slower velocity NO (zer0) velocity

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