Energy resources and energy transfers - Work and power

Question 1

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

Answer 1

𝑤𝑜𝑟𝑘 𝑑𝑜𝑛𝑒 = 𝑓𝑜𝑟𝑐𝑒 × 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑚𝑜𝑣𝑒𝑑
𝑊 = 𝐹 × d

Question 2

What is work done the equal to

Answer 2

Work done = Energy transferred

Question 3

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

Answer 3

𝑔𝑟𝑎𝑣𝑖𝑡𝑎𝑡𝑖𝑜𝑛𝑎𝑙 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑒𝑛𝑒𝑟𝑔𝑦 = 𝑚𝑎𝑠𝑠 × 𝑔𝑟𝑎𝑣𝑖𝑡𝑎𝑡𝑖𝑜𝑛𝑎𝑙 𝑓𝑖𝑒𝑙𝑑 𝑠𝑡𝑟𝑒𝑛𝑔𝑡ℎ × ℎ𝑒𝑖𝑔ℎ𝑡
𝐺𝑃𝐸 = 𝑚 × 𝑔 × ℎ

Question 4

know this:

Answer 4

𝑘𝑖𝑛𝑒𝑡𝑖𝑐 𝑒𝑛𝑒𝑟𝑔𝑦 = ½ × 𝑚𝑎𝑠𝑠 × 𝑠𝑝𝑒𝑒𝑑2
𝐾𝐸 = 1/2 × 𝑚 × 𝑣 -> squared <—–I

Question 5

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

Answer 5

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

Question 6

What is power

Answer 6

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

Question 7

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

Answer 7

work done
𝑝𝑜𝑤𝑒𝑟 = ——————-
time

     W P = -------
      t