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What is the concept commonly used in Engineering Mechanics?
What is the symbol used to represent the radius of a circle?
What is the formula to calculate the moment of inertia of a circle about its axis?
What is the diameter of a circle in terms of its radius?
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What is the field of study where forces are classified and analyzed?
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What is the location of the EXCEL FIRST REVIEW AND TRAINING CENTER, INC. in Cebu?
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What is the direction of the gravitational force exerted on an object?
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What is the difference between dynamic friction and static friction?
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What is represented by the symbol 'R' in the given equation?
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What is the name of the force that is directed towards the center of the earth?
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What does the symbol 'a' represent in the given equation?
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What is the coefficient of friction represented by in the given equation?
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What is the unit for the acceleration due to gravity (g) in the metric system?
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What is the formula for the weight of an object?
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What is the moment of inertia also called?
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What is the formula for the centroidal moment of inertia of a triangle?
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What is the normal force?
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What is the unit for the acceleration due to gravity (g) in the imperial system?
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What type of friction opposes a moving object?
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What is the formula for the moment of inertia of a triangle?
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What is the coefficient of static friction dependent on?
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What is the relationship between Ix and Iy?
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What is the formula for the moment of inertia of a circle?
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What is the formula for the slope of the angle of friction?
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What is the moment of inertia of a triangle about its centroid?
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What is the formula for the moment of inertia of a circle about its diameter?
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What is the direction of the friction force with respect to the actual motion?
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What is the formula for calculating the moment of inertia of a rectangle with respect to an axis passing through its centroid?
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What is the formula for calculating the moment of inertia of a rectangle with respect to an axis passing through its base?
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What is the purpose of the transfer formula in calculating moment of inertia?
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What is the correct definition of friction?
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What is the type of friction that opposes impending motion?
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What is the correct statement about the direction of friction force with respect to the motion?
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What is the correct definition of moment of inertia?
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Study Notes
Forces in Mechanics
- Force is a common concept used in Engineering Mechanics, with different types and classifications.
- Gravitational Force is a force exerted by the earth's gravity on an object, represented by the weight of the object, directed towards the center of the earth.
Weight
- Weight (W) is defined as W = mg, where g = 9.81 m/s2 or 32.2 ft/s2.
Normal Force
- Normal Force (N) is a force that is perpendicular to the surface of contact, if there are two objects or planes in contact with each other.
Friction Force
- Friction Force (F) is a force that is parallel to the surface of contact, if there are two objects or planes in contact with each other.
- Friction is the limited amount of resistance to sliding between the surfaces of two bodies in contact.
- Kinetic friction is the friction against a moving object, while static friction is the friction against a stationary object.
- The coefficient of static friction depends on the type of materials or the nature of surfaces in contact.
Moment of Inertia
- Moment of Inertia is also called the second moment of area.
- Centroidal moment of inertia is the moment of inertia of the figure with respect to an axis passing through the centroid.
- The moment of inertia can be calculated using the transfer formula: I = Ig + Ad2, where d is the distance from the centroid to the axis, and A is the area of the figure.
Moment of Inertia for Different Shapes
- Rectangle: Ix = bh3 / 12, Iy = bh3 / 12
- Triangle: Ix = bh3 / 36, Iy = bh3 / 36
- Circle: Ix = πr4 / 4, Iy = πr4 / 4
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Description
Explore the fundamental concepts of forces in engineering mechanics, including gravitational force, weight, and normal force, with their definitions and formulas.
