Work and Energy (VCE SSCE Physics): Flashcards

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Work and Energy
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Work in physics

Energy transferred/transformed by force action

Work formula (force parallel to displacement)

W=FsW = Fs

Work formula when force at angle θ\theta

W=Fscos⁡θW = Fs\cos\theta

SI unit of work

Joule (J)

Work done when force perpendicular to displacement

Zero (no work done)

Gravitational potential energy formula

Eg=mgΔhE_g = mg\Delta h

Kinetic energy formula

Ek=12mv2E_k = \frac{1}{2}mv^2

Convert km h⁻¹ to m s⁻¹

Divide by 3.6

Effect on KE when velocity doubles

KE quadruples (increases by factor of 4)

Area under force-distance graph equals

Work done

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