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Forces and Newton's Laws of Motion, Objects in motion stay in motion,…
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Objects in motion stay in motion, objects at rest stay at rest, unless acted upon by an unbalanced force.
The acceleration of an object is directly proportional to the net force and inversely proportional to the mass.
For every action, there is an equal and opposite reaction.
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A force is any push or pull. We measure it in Newtons (N). One Newton is 1 kgᐧm/s^2 (a mass accelerating)
When “balanced”, forces in either direction cancel each other out.
When “unbalanced”, forces in either direction are unequal resulting in a net force.
Calculated by multiplying the mass of the object (kg) by the acceleration of gravity (9.8 on earth) The force of gravity (Fg) is known as weight. It is not 9.8. 9.8 m/s/s is the acceleration that objects experience on Earth
A supportive force that is perpendicular to the surface that the object is one. Is only relevant if the object is actively resting on a surface. If an object is resting on a steady surface, the normal force is always equal to the gravitational force
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Friction is the resistance one surface or object encounters when moving over another. Friction is always in the opposite direction that the object is moving
μ is a dimensionless decimal normally between 0 and 1. It can't be under 0, but occasionally is over 1. It is the coefficient of friction that can be used to help find the force of friction or vice versa. The higher the coefficient is, the greater the resistance
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Static μ is the coefficient of friction for when an object is not moving. It is higher than the kinetic μ due to inertia
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Net forces change motion, not maintain it. Only a net force causes an acceleration. Not every force.
Sustaining motion does not require a force. Forces relate to changes in motion. Objects can be moving in different directions than way the forces are acting
When there are two forces acting in opposite directions, you can add/subtract to figure out the net force
A pulling force, like a string or chain. If the object is dangling vertically, it is like a normal force, just opposite.
Sort of like a frictional force, but with air. Goes in the opposite direction that the object is moving
A free body diagram is a visual representation of the forces acting on an object during a specific moment in time. The arrows show the power of the force through their length.
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The same amount of force on different objects can have a very different effect if they are different in mass.
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Weight is the force of gravity acing upon an object. It is calculated in newtons. The mass of an object is how much stuff it contains. The mass is normally expressed in Kg. To calculate from mass to weight, you multiply the mass by the gravitational acceleration
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