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Physics > Energy resources and energy transfers - Work and power > Flashcards

Energy resources and energy transfers - Work and power Flashcards

1
Q

What is the the relationship between force, work done and distance moved in the direction of the force

A

π‘€π‘œπ‘Ÿπ‘˜ π‘‘π‘œπ‘›π‘’ = π‘“π‘œπ‘Ÿπ‘π‘’ Γ— π‘‘π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’ π‘šπ‘œπ‘£π‘’π‘‘
π‘Š = 𝐹 Γ— d

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2
Q

What is work done the equal to

A

Work done = Energy transferred

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3
Q

the relationship between mass, gravitational field strength, height and gravitational potential energy

A

π‘”π‘Ÿπ‘Žπ‘£π‘–π‘‘π‘Žπ‘‘π‘–π‘œπ‘›π‘Žπ‘™ π‘π‘œπ‘‘π‘’π‘›π‘‘π‘–π‘Žπ‘™ π‘’π‘›π‘’π‘Ÿπ‘”π‘¦ = π‘šπ‘Žπ‘ π‘  Γ— π‘”π‘Ÿπ‘Žπ‘£π‘–π‘‘π‘Žπ‘‘π‘–π‘œπ‘›π‘Žπ‘™ 𝑓𝑖𝑒𝑙𝑑 π‘ π‘‘π‘Ÿπ‘’π‘›π‘”π‘‘β„Ž Γ— β„Žπ‘’π‘–π‘”β„Žπ‘‘
𝐺𝑃𝐸 = π‘š Γ— 𝑔 Γ— β„Ž

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4
Q

know this:

A

π‘˜π‘–π‘›π‘’π‘‘π‘–π‘ π‘’π‘›π‘’π‘Ÿπ‘”π‘¦ = Β½ Γ— π‘šπ‘Žπ‘ π‘  Γ— 𝑠𝑝𝑒𝑒𝑑2
𝐾𝐸 = 1/2 Γ— π‘š Γ— 𝑣 -> squared <—–I

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5
Q

how does the conservation of energy produce a link between gravitational potential energy,
kinetic energy and work

A

If work is done on an object, its KE or GPE will increase. Conversely, if work is done by an object, its KE or GPE will decrease

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6
Q

What is power

A

Power is the rate of transfer of energy or the rate of doing work

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7
Q

What is the relationship between power, work done (energy transferred) and time

A

work done
π‘π‘œπ‘€π‘’π‘Ÿ = β€”β€”β€”β€”β€”β€”-
time

     W P = -------
      t
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Physics (20 decks)

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