Flashcards
Chapter 9 - Motion
Flashcards do conjunto (22)
- 1What is the equation for speed (scalar quantity)?Speed = Distance / Time
OR
V = S / T - 2On a Distance-Time graph, what does a horizontal line mean?It means that the object is stationary
- 3On a Distance-Time graph, what does a straight, sloping line mean?It means that the object is travelling at a constant speed
- 4What does the gradient represent on a Distance-Time graph?It represents the object's speed
- 5What are the other rearrangements of the formula for speed?Time = Distance / Speed (T = S / V)
AND
Distance = Speed x Time (S = V x T) - 6What does the letter 's' represent in the formula for speed?Distance
- 7What is a vector quantity?Vector quantities (e.g. 3 m/s as a velocity) have a magnitude (size) and a direction
- 8What is a scalar quantity?Scalar quantities (e.g. 3 m/s as a speed) only have a magnitude, not a direction
- 9What is velocity?Velocity is a speed given, but in a certain direction
- 10What is the formula for acceleration?Acceleration =
Δv
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t - 11In the formula for acceleration, what does 'Δv' mean?The change in velocity
- 12In the formula for acceleration, what does 't' mean?The time taken
- 13Give ONE/ANOTHER equation involving acceleration. (If you already did one of these before, do a different formula)a = Δv / t
OR
v² - u² = 2as
OR
a = (v - u) / t - 14Give ONE/ANOTHER equation involving acceleration. (If you already did one of these before, do a different formula)a = Δv / t
OR
v² - u² = 2as
OR
a = (v - u) / t - 15Give ONE/ANOTHER equation involving acceleration. (If you already did one of these before, do a different formula)a = Δv / t
OR
v² - u² = 2as
OR
a = (v - u) / t - 16Give an example of how you can measure acceleration in real life.Use a motion sensor connected to a computer (which can measure velocity changes), which will automatically create a velocity-time graph for you
- 17In a Velocity-Time graph, what does a horizontal line mean?It means that the acceleration is zero (travelling at a constant speed)
- 18In a Velocity-Time graph, what does a positive gradient mean?It means that there is a positive acceleration
- 19In a Velocity-Time graph, what does a negative gradient mean?It means that there is a negative acceleration (deceleration)
- 20How do you work out the distance travelled on a Velocity-Time graph?You can work out the distance on a Velocity-Time graph by calculating the area under the line
- 21Explain what the tangent of a curved line looks like.Pick any point on a curved line, and draw a straight line that touches that point on the curved line only. This straight line is the tangent
- 22How do you work out the speed at a particular point on a graph line that is curved?Create a tangent of that point, and use the formula: gradient = change in x / change in y to work out the gradient/speed of the tangent (straight) line. The gradient is equal to the speed.
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- Year 9 Physics FlashCards sobre Chapter 9 - Motion, criado por Hyper Molecular em 21-04-2018.
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- Hyper Molecular
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