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33 Cards in this Set
- Front
- Back
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How many sig digits in "333"? |
3 |
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How many sig digits in "20458"? |
5 |
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How many S.D in "0.00010"? |
2 |
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How many S.D in "20 000 000"? |
8 in Alberta |
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What are kinematics? |
Describing how things move |
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What is a scalar? |
- a measurement with magnitude (only) ex) 40 oC, 30 psi, … |
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What is vector? |
A-a measurement that has both magnitude and direction ex) 50 km[south] |
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+9 meters west is equal to.... |
-9 meters east |
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Is there a scalar for every vector? |
Yes, if there isn’t special scalar name for a vector quantity, we justsay magnitude of the ________. |
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Can you upgrade a scalar into a vector? |
We cannot go the other direction (‘upgrade’ a scalar to a vector).Energy is a scalar quantity, it has no vector equivalent. |
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What is AVERAGE SPEED (vavg)? |
-distance travelled over aperiod of time |
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What is AVERAGE VELOCITY (vavg)? |
-displacement travelled over aperiod of time |
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what is INSTANTANEOUS VELOCITY (vi , vf, etc… context)? |
-the velocity at a given instant in time… reading off your speedometer (including compassdirection) is an instantaneous velocity |
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What is the slope of the line? |
slope = rise/run |
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What do you derive (get) velocity and acceleration from? |
Velocity is position/time |
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What is uniform motion? |
An object moving at a constant velocity (magnitude and direction) is saidto be undergoing uniform motion |
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When is a motion non-uniform? |
If either the magnitude or the direction changes, the motion is nonuniform |
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Is an object at rest undergoing uniform motion? |
Yes, speed is constant 0, direction not changing |
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How can you find when two lines intersect? |
- read point of intersection right off the graph (approx.) - y = mx + b for both runners and solve the system ex) y = mx +b y = mx + b mx + b = mx + b |
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What are the 3 definitive units on the y axis on a x vs time graph? |
Position: m |
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On a velocity time graph, if the line is going down from the origin the object is __________ |
Accelerating; going in the other direction |
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How can you use acceleration + Velocity to see if an object is accelerating or decelerating? |
When the directions (signs) if velocity and acceleration are the same, the object is accelerating |
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When converting data from a velocity time graph to a position time graph, where do you place the line? |
Origin |
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How can you find the displacement of a velocity time graph? |
By calculating the area of the shapes made |
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What is uniformly accelerated motion? |
The velocity is being increased at a constant rate (acceleration is uniform/constant) |
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Do heavier objects fall faster than lighter ones? |
Heavier objects fall at the SAME rate as lighter objects. Air resistance must be accounted for |
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What is projectile motion? |
Projectile Motion- motion in a vertical plane |
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What is a projectile? |
Projectile- an object released or thrown in the |
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In a vertical plane, what is the acceleration? |
Gravity |
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What is the acceleration due to gravity? |
-9.82ms^-2 |
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What is terminal velocity? |
The maximum speed you can reach from falling (200 kph) due to air resistance. Takes 15 seconds approximately to achieve |
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When you throw something up what are the stages in the velocity? |
Gradually slows, stops, and the starts coming back down. and speeds up |
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