# Force, Motion, and Energy Study guide Kayden Hussain
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Newton’s First Law

An object remain at rest or move in a straight line with a constant speed unless acted on by a force. (Also known as The Law Of Inertia.)
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Inertia

measure of an object’s tendency to remain at rest or keep moving.
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Force

A push or pull.
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Contact Force

Objects that are touching.
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Long Range Force

Forces that include gravity, magnetism and electricity.
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Balanced Force

Opposite forces that are equal and doesn’t move and in opposite directions.
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Unbalanced Force

Forces that move in opposite directions that are not equal of strength.
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Net force

The difference between two forces.
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Acceleration

The acceleration of an object depends on the mass of the object and the amount of force applied to the object. The more mass of an object, the less of acceleration. The less mass, the greater of acceleration.
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Newton’s Second Law

Object acted on by an unbalanced force will accelerate in the direction of the force.
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Formula for gravity

Force(N) = mass x 9.8m/s^2
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Weight

Measures the pull of gravity. It changes depending how strong is gravity.
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Mass

A measure of the amount matter in an object. It never changes regardless of the location.
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Friction

Two objects that are rubbing against each other. It resists motion, always present between two object, and creates thermal energy.
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Static Friction

Keep stationary objects from moving on a surface.
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Rolling Friction

The type of friction that makes a tire turn and a ball roll.
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Sliding Friction

A friction between 2 surfaces that slide by each other.
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Air Resitance

Air molecules act on the forward moving surface of an object, slowing its motion.
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Newton’s 3rd law

For every action there is reaction. –Forces act in opposite directions –Action/reaction forces work on diffrent bodies. –Action/reaction forces occur at the same. Also known as The Law of Conservation Of Momentum.
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Motion

A change in position.
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Distance

The entire path on object takes or travels.
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Distance’s Formula

D =Speed x Time
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Displacement

The distance and direction between the starting point and stopping point.
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Constant speed

Speed that is the same at a given moment in time.
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Instantaneous speed

Speed at a particular time.
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Velocity

Speed in a particular direction.
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Velocity’s Formula

Distance/time
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Acceleration’s formula

Force(N)/mass(m)
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Speed

The distance divided by the time need to travel the distance.
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Work