physics

Work

==W = F * d==

W - work

F - force

d - displacement

in this case the displacement is the same so the work is done in the same direction, but because of the angled force the equestion on its value changes:

==W = F * d * cos==

cos - cosinus of the angle of the applied force

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Positve/Negative work

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%%W+%% → ΔKE is higher

one object does positive work on the other (cuz it causes it to speed up)

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==W -== → ΔKE is lower

one obejcts does negative work on the other (cuz it causes it to slow down)

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%%W+%% → F is parallel to d

theyre going in the same directions (→ →)

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==W -== → F isnt parallel to d

theyre going in opposite directions (--> <--)

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Energy

Kinetic energy

}}for objects in motion}}

==KE = 1/2 mv^2==

KE - kinetic energy [J]

m - mass [kg]

v - speed [m/s]

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Potential energy

}}is a stored energy, the ability and potensial of object to do work without doing work}}

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==PE = mgh==

PE - potensial energy [J]

g - gravitational accelaration [m/s^2]

h - height [m]

(thats for gravitational potensial energy)

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Mechanical energy

used when only forces acting on the object are conservative forces (gravitational, elastic, electric)

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==ME = KE + PE==

ME - Mechanical energy

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Power

}}the rate at which energy is being transport}}

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==P = w/t = F * d/t==

P - power [watt]

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==P = F * v==

v - velocity/speed

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