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33 Cards in this Set
- Front
- Back
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What do these symbols represent in Kinematics formulae? s u v a t |
s - Displacement u - Initial velocity v - Final velocity a - Acceleration t - Time
Make sure to write these symbols lowercase, as the capitalised versions mean different things. |
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SUVAT formula that does not include displacement |
v = u + at
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SUVAT formula that does not include acceleration
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v + u
s = ------- t 2 |
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SUVAT formula that does not include time |
v² = u² + 2as |
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SUVAT formula that does not include Final Velocity |
s = ut + ½ at² |
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SUVAT formula that does not include Initial velocity |
s = vt - 0.5at² |
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What does the gradient on a Displacement-Time graph represent? |
Average velocity. |
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What does the area under a Displacement-Time graph represent? |
It has no meaning |
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What does the gradient on a Velocity-Time graph represent? |
Acceleration. |
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What does the area under a Velocity-Time graph represent? |
Displacement. |
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What does the gradient on a Acceleration-Time graph represent? (Not necessary for exam) |
Jerk (Rate of change in acceleration) |
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What does the area under a Acceleration-Time graph represent? |
Velocity. |
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When is an object in freefall? |
When no force other than gravity is affecting its movement |
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Newtons second law |
F = ma |
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What is the normal reaction? |
A force which acts perpendicular to a surface an object is in contact with |
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What is friction? |
A force that opposes the motion between two rough surfaces |
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What is tension? |
The force acting on an object when it is being pulled by a string |
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The unit of measurement of Weight, Tension, and Normal Reaction? |
Newtons (N) |
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(In resolving forces) What is Pythagoras theorem? |
a² + b² = c² |
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(In resolving forces) Sin(θ) = |
Opposite / Hypotenuse |
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(In resolving forces) Tan(θ) = |
Opposite / Adjacent |
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(In resolving forces) Cos(θ) = |
Adjacent / Hypotenuse |
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Formula to resolve horizontal force |
F sin(θ) |
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Formula to resolve vertical force |
F cos(θ) |
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The ______ the coefficient of friction (µ), the rougher the two surfaces are. |
The -larger- the coefficient of friction (µ), the rougher the two surfaces are. |
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What two factors does the limiting factor of friction depend on? |
- Normal Reaction (R) - The coefficient of friction (µ) |
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Between 2 perfectly smooth surfaces, what is the coefficient of friction (µ)? |
0. |
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Formula for the limiting value of friction? |
Fmax = µR |
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What is the limiting value of friction? |
The force at which an object can overcome the opposition of frictional force. (Fmax) |
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What is the formula for acceleration of an object sliding down a smooth, inclined plane? |
g sin(θ) = a |
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What is the Normal Reaction force for an particle on an inclined plane? |
R = mg cos(θ) |
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What is the Frictional force of a stationary particle on an inclined plane? |
mg sin(θ) = F |
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For a particle on an inclined plane, what is the relationship between the coefficient of friction to the incline? |
If stationary tan(θ) = µ
If accelerating up the plane tan(θ) > µ
If accelerating down the plane tan(θ) < µ |
