Flashcards
PHYS 200 Unit 7: Work, Energy, and Energy Resources
Flashcards do conjunto (19)
- 1energyability to do work
- 2work-transfer of energy by force that causes object to be displaced
-product of component of force in direction of displacement and magnitude of displacement - 3work formulaW = F d cosθ
- 4net work-work done by net force, or vector sum of all forces, acting on an object
-W_net = F_net d cosθ - 5work-energy theorem-net work on system equals change in quantity 1/2 m v^2
-W_net = 1/2 mv^2 - 1/2 mv_0^2 - 6kinetic energy-energy object has by reason of its motion
-KE = 1/2 m v^2 - 7work done by friction-W_fr = f_k d cos(180)
-W_fr = -f^k d - 8potential energyenergy due to position, shape, or configuration
- 9gravitational potential energyenergy an object has due to its position in gravitational field
- 10potential energy formulaW = Fd = mgh
- 11conservative force-force for which work done by or against it depends only on starting/ending points of motion and not path taken
-e.g. gravitational force, force of elastic spring, electrostatic force - 12non-conservative force-force whose work depends on path followed between given initial and final configurations
-e.g. frictional force, push/pull, air resistance - 13potential energy of elastic springPE_s = 1/2 k x^2
-k: spring constant
-x: displacement from not deformed position - 14conservative forces and energy-W_c = ΔKE
-W_c = -ΔPE
-ΔKE + ΔPE = 0 - 15conservation of mechanical energyrule that sum of kinetic energies and potential energies remains constant if only conservative forces act on and within system
- 16law of conservation of energy-total energy is constant in any process
-energy may change in form or be transferred from one system to another, but total remains
-KE_i + PE_i + W_nc + OE_i = KE_f + PE_f + OE_f - 17efficiency-measure of effectiveness of input of energy to do work
-Eff = (useful energy/work output)/(total energy input)
-Eff = W_out/E_in - 18power-rate at which work is done
-P = W / t
-P = F v - 19power and energy consumptionE = P x t
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- O usuário eliminou as informações de disciplina FlashCards sobre PHYS 200 Unit 7: Work, Energy, and Energy Resources, criado por Usuário eliminado em 13-04-2021.
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- Usuário eliminado · abr 2021
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- Criado por Adriana Vincelli-Joma · 12 abr 2021
- Copiado por Adriana Vincelli-Joma · 13 abr 2021
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