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Topic 5: Work and Energy - Coggle Diagram
Topic 5: Work and Energy
Work Done by a Constant Force, W
W = F(d) cos θ, where F is Force direction of displacement, d is Displacement
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when F and d are parallel each other, the work done, W is maximum
when F and d are orthogonal each other, the work done, W is 0
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Work Done by a Varying Force, W
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Work done by spring
Force of spring, Fs = -kx
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W = 1/2 (k)(x^2), where k is spring constant, x is the change of displacement
displacement, x is negative when compressed, positive when stretched
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Kinetic Energy, Ek
Ek = 1/2 (m)(v^2), where m is mass of moving object, v is its velocity
Work and energy have same units, Joules (J)
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Work-Energy
Principle
Work done, W = Change of Kinetic energy, ΔEk
W is positive when the final velocity, v is greater than initial velocity, v0
W is positive when the final velocity, v is greater than initial velocity, v0
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