The acceleration of an object is proportional to its resultant force and inversely proportional to the objects mass
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Inertia -
The tendency of an object to remain still or in a uniform motion / The inertial mass of an object is the measure of the difficulty of changing the object's velocity
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Weight -
The Force of an object acting downwards as a result of the object's mass and the strength of gravity
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Mass -
The total quantity of matter in an object
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Weight (N) = ...
Mass (kg) * Gravity (N/kg)
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Terminal Velocity -
As an object falls in a fluid, its acceleration decreases as the forces on it begin to balance due to resistance / This eventually results in falling at a constant speed called terminal velocity
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Factors affecting Breaking Force (2) -
The current speed of the vehicle - The greater its speed, the more force needed to stop it / The Mass of the Vehicle - The greater the mass, the greater the braking force needed
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Stopping Distance =
Thinking Distance + Braking Distance
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Factors Affecting stopping Distance -
Adverse weather conditions / Wear on tyres and brake pads / reaction time / Faster speeds
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Momentum (kg m/s) =
Mass (kg) * Velocity (m/s)
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In a closed system, the total momentum before an event is equal to...
The total momentum after an event
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Explosion -
When two objects push each other apart
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Mass of A * Velocity of A =
Mass of B * Velocity of B
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Reducing Impact Forces (2 methods in cars) -
Front Crumple zone - Reduces the cars momentum to reduce impact time / Rear Crumple Zone - Increase the car's momentum to reduce the impact time
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Force =
(Mass * Change in Velocity) / time
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Other Safety measures in cars -
Seat belts - Stretch to increase the impact time / Air bags - Inflate to reduce impact force of driver
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Elasticity -
An object is elastic if it can be deformed and misshapen and still return to its original shape
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Hooke's Law -
The spring constant of a spring is directly proportional to the force applied provided that the limit of proportionality is not breached
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Limit of Proportionality -
The limit to which a spring can be extended without overstretching past an expected level
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Force =
Spring Constant (N/kg) * Extension (m)
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Other cards in this set
Card 2
Front
The acceleration of an object is proportional to its resultant force and inversely proportional to the objects mass
Back
Newton's Second Law of Motion -
Card 3
Front
The tendency of an object to remain still or in a uniform motion / The inertial mass of an object is the measure of the difficulty of changing the object's velocity
Back
Card 4
Front
The Force of an object acting downwards as a result of the object's mass and the strength of gravity
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