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What is the difference of mass and gravity
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Mass is the amount of matter composing the object, whereas gravity is the force acting on the object and the product of its mass and acceleration due to gravity (g=9.8m/s2)
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Define moment of inertia
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The measure of resistance to angular acceleration. It is affected both by the total mass and the distance that mass is from the COR:
I=mr2(m=mass, r=distance from COR)
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Distance x Force=?
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Work
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Work/time=?
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Power
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Kinematics is what? And involes what?
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Studying of motion without consideration of the forces that act upon it. Involves position, displacement, velocity, and acceleration.
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Kinetics is what? What are some terms with kinetics
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The study of motion and the forces involved. Moment of inertia, work, power, and energy (potential and kinetic)
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What is the difference b/w scalar and vecter quantities?
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Scalar only has magnitude whereas vecter has 4 components: magnitude, orientation, point of application, and direction
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Name the 4 forces that act within a force system
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Collinear- act in straight line ("pull my finger")
Parallel- forces act parallel to each other
Concurrent- intersect at same point
General- everywhere
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Give the physics definiton of force couples.
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- Forces are equal and parallel in magnitude
- points of application on opposite ends of lever
- produce equal torques of the same sense. As in the forces are in opposite directions but act on different sides of the axis of rotation of the lever
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What is the biological definition of torque?
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-2 or more forces that act on a rigid body
- rotary motion is produced
- translational motion is minimized
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What is load?
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Any force or combination of forces applied to outside of a structure.
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Force/total area=?
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Total Load.. Sun of all external forces
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Types of stresses
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Tension
Compression
Shear (known as friction)
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Unit load is describe as..?
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The load expressed per unit of cross-sectional area. (Most useful)
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The physical deformation of matter resulting from a load is called what?
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Strain
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