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43 Cards in this Set
- Front
- Back
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What are the 5 SUVAT formulas? |
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What does the u mean in SUVAT equations? |
Starting velocity in m/s |
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What does the v mean in SUVAT equations? |
Final velocity in m/s |
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What does t mean in SUVAT equations? |
Time in seconds |
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What does the a mean in the SUVAT equations? |
Acceleration in m/s^2 |
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What does s mean in SUVAT equations? |
Displacement in metres |
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What is the starting velocity (u) when a particle is moving from rest? |
0 |
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How do you write acceleration in your formula when the particle is decelerating? |
As -a |
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What does a smooth surface mean? |
There is no friction |
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What is gravity in falling down or going up? |
Falling = going with gravity = positive = 9.8 Going up = going against gravity = negative = -9.8 THIS IS ACCELERATION |
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What does retardation mean? |
Deceleration |
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What is displacement (s) if the particle returns back to the start? |
0 |
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How do you draw a velocity time graph? |
Positive gradient = acceleration Negative gradient = deceleration Straight line = constant speed |
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What does the area under a velocity-time graph symbolise? |
Distance travelled. |
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How do you draw an acceleration -time graph? |
Above the x-axis = acceleration Below the x-axis = deceleration On the x -axis = constant speed |
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What does the area under an acceleration -time graph mean? |
Change in velocity |
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How do you work out force? |
Mass × acceleration So weight is.... mass × gravity |
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Where is the normal reaction? |
The force that is perpendicular to the surface. Reaction from the surface which would stop it from falling through. Mass of object × gravity |
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What does it mean if an object is at rest? |
It's in static equilibrium which means that the forces in opposite directions are equal |
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What does a rough surface mean? |
There is friction |
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What is the formula for working out the area of a trapezium? |
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How do you work out friction on an inclined plane? |
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How do you find out tension in connected particles? |
Treat them as separate to one another so the tension isn't cancelled out |
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How to workout an unknown in connected particles on the same plane? |
Treat them as one particle. This will cancel out the tension which with mean there are less unknowns |
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What is conservation of momentum and the formula for it? |
The total momentum before is the same after |
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How do you figure out the momentum of a particle? |
Mass × velocity |
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What unit must the be for mass? |
Kg |
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What does an in extensible string mean? |
That the tension is the same throughout |
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What is the formula for an impulse? |
I=m (v-u) |
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What is the formula for a moment? |
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What does a uniform rod mean? |
That the weight is in the middle |
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What does it mean if a particle is in equilibrium? |
The moments are equal |
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How do you write a vector? |
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How can you tell if two vectors are parellel |
If they have the same direction |
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How do you find the magnitude of vector? |
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How do you find distance using vectors? |
Vector × time |
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What is the formula for a unit vector? |
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How to find out velocity from a unit vector director? |
Unit vector director × speed |
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What is the position vector and how do you figure it out? |
The vector in relation to the origin. |
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How do you find the bearings of a vector? |
tan^(-1)(j/i) |
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When solving particles on an inclined plane, do you use sin or cos when you have the angle? |
Cos if you have the angle. |
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When solving particles on an inclined plane, do you use sin or cos when you dont have the angle? |
Sin if you don't have the angle |
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How do you add vectors |
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