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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Displacement |
The distance from the initial to the final position with a given direction |
Vector |
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Velocity |
The speed of an object in a given direction per unit time |
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Average speed |
Distance travelled by an object divided by the duration of the time interval |
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Acceleration |
The rate of change of velocity |
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Thinking Distance |
Distance travelled during reaction time |
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Breaking Distance |
Distance travelled during reaction time |
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Define a Newton |
The force required to give a mass of 1kg an accelleration of 1ms-2 in the direction of force |
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Centre of mass |
The point where the weight of an object SEEMS to act |
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Centre of gravity |
The point where the weight of an object WILL act |
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Conditions of Terminal velocity |
Drag on object is equal and opposite to weight, it's accelleration = 0 and it's speed is constant |
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Moment of a force |
Moment = force x perpendicular distance from pivot |
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Conditions of equillibrium |
Net force = 0 Net moment = 0 |
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Definition of a Couple |
A pair of forces that are equal and opposite in direction. Are parallel and along different lines |
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Torque of a couple |
Torque of a couple = one force x perpendicular separation between forces |
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Define density |
Density = mass per unit volume |
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Define pressure |
Pressure = normal force exerted per unit cross sectional area |
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Density equation |
P = m/V |
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Pressure equation |
p = F/A |
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Pressure experienced in a fluid equation |
p = height of liquid column x density of fluid x acceleration due to gravity p = hpg |
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Archimedes' principle |
Upthrust exerted on an object is equal to the weight of fluid that the body displaces |
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Factors that increase drag |
Density of fluid Area of object Velocity of object |
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