Force, Motion, and Energy Study guide – Flashcards
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Newton's First Law
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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
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measure of an object's tendency to remain at rest or keep moving.
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Force
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A push or pull.
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Contact Force
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Objects that are touching.
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Long Range Force
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Forces that include gravity, magnetism and electricity.
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Balanced Force
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Opposite forces that are equal and doesn't move and in opposite directions.
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Unbalanced Force
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Forces that move in opposite directions that are not equal of strength.
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Net force
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The difference between two forces.
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Acceleration
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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
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Object acted on by an unbalanced force will accelerate in the direction of the force.
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Formula for gravity
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Force(N) = mass x 9.8m/s^2
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Weight
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Measures the pull of gravity. It changes depending how strong is gravity.
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Mass
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A measure of the amount matter in an object. It never changes regardless of the location.
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Friction
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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
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Keep stationary objects from moving on a surface.
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Rolling Friction
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The type of friction that makes a tire turn and a ball roll.
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Sliding Friction
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A friction between 2 surfaces that slide by each other.
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Air Resitance
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Air molecules act on the forward moving surface of an object, slowing its motion.
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Newton's 3rd law
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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
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A change in position.
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Distance
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The entire path on object takes or travels.
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Distance's Formula
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D =Speed x Time
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Displacement
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The distance and direction between the starting point and stopping point.
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Constant speed
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Speed that is the same at a given moment in time.
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Instantaneous speed
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Speed at a particular time.
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Velocity
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Speed in a particular direction.
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Velocity's Formula
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Distance/time
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Acceleration's formula
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Force(N)/mass(m)
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Speed
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The distance divided by the time need to travel the distance.
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Work
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It's only done when a force acts on an object which displaces it or causes the movement of the object.
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Work's Formula
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Joules(J) = Force(N) x Distance(meter)
