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Published byChristina Whitehead Modified over 9 years ago
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Science Investigations
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A push or pull on an object Units: Newton (N) = 1 kg x m/s 2 Net Force (Fnet) : sum of all of the forces that are acting on an object Balanced Forces: Fnet = 0 Object is at rest or moving with constant velocity Unbalanced Forces: Fnet is not equal to 0, Object is accelerating or decelerating
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Applied – contact force in the direction the object is moving Tension- caused by a rope, cable, ect., directed away from the object Friction- opposes the motion of objects, must have contact Normal- caused by a surface Force of gravity- force at a distance, caused by attraction between two objects
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Static Friction of an object at rest Greater than kinetic friction (harder to get an object moving than to keep it moving) Friction is greatest when surfaces are rough How can you get a car to move that is stuck in the snow? Kinetic Friction of a moving object
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Sliding Two surfaces moving past each other Rolling Movement of a circular object on a surface Fluid Friction Movement of an object through a liquid or gas Ex. Air resistance
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