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17 Cards in this Set
- Front
- Back
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A force has ____ and _____
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Magnitude and direction
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Force: a scalar or vector?
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Vector
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Newton's third law
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Every action has an equal and opposite reaction, "directed to contrary parts", i.e. Directed along the same line of action
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What are the two "types" of forces
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Distance and contact
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Question that E14 asks...
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What are the forces?
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Question that E15 asks...
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What is the motion?
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Force notation... F^(x/y)... What's x and y?
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Force^(on point / from point)
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What is the universal gravitational constant?
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G = 6.67 x 10^(-11) N*(m^2)/(kg^2)
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What is a particle?
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A point WITH MASS
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Equation for gravity between two points (more physics than engineering)
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F^(Q/P) = (-G*mP*mQ/r^2)*(u_hat ^(Q/P)), where mP is the mass of P, mQ is the mass of Q, r is the distance between the two particles, and u^(Q/P) is the unit vector pointing to Q from P, which is equal to the vector r^(Q/P) divided by the magnitude of r^(Q/P)
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Engineers make ____
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Stuff
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Sales makes _____
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$$$
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Marketing makes ____
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The message, they spend money
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Who makes the reason?
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Society?
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F_spring = -k*x ... Clear enough?
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No! See other flashcard, must add directionality!
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Equation for a spring force
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F_spring (with half arrow on top) = -k * stretch * unit vector
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Definition of stretch for the spring equation
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Stretch = L - Ln, where Ln is the natural length of the spring (i.e., when no force is applied). L = the magnitude of the position vector from point to point
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