Ch. 7 Key Equations - University Physics Volume 1 _ OpenStax.pdf

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Unformatted text preview: 2020/12/7 Ch. 7 Key Equations - University Physics Volume 1 | OpenStax Key Equations Work done by a force over an infinitesimal displacement → → ∣ →∣ ∣ →∣ dW = F ⋅ d r = ∣ F ∣ d r cos θ ∣ ∣ ∣ ∣ Work done by a force acting along a path from A to B WAB = ⃗ F ⋅ dr ⃗ ∫ pathAB Work done by a constant force of kinetic friction Wfr = −fk |lAB | Work done going from A to B by Earth’s gravity, near its surface Wgrav,AB = −mg (yB − yA ) Work done going from A to B by one-dimensional spring force Wspring,AB = − ( Kinetic energy of a non-relativistic particle K = Work-energy theorem Wnet = KB − KA Power as rate of doing work P = Power as the dot product of force and velocity ⃗ P = F ⋅ v⃗ 1 2 2 mv = p 1 2 k) (x 2 B − x 2 A ) 2 2m dW dt 1/1 ...
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