EQUATIONS FOR EXAM

Question 1

work done,

Answer 1

𝑾𝒅=𝑭 𝒙 𝒅

Question 2

Gravitational Potential Energy 3

Answer 2

𝑮𝑷𝑬=𝒎 𝒙 𝒈 𝒙 𝒉

Question 3

Gravitational Potential Energy 2

Answer 3

Weight x height
𝑮𝑷𝑬=𝑾 𝒙 𝒉

Question 4

Kinetic Energy

Answer 4

½ x mass x speed2

Question 5

Elastic Potential Energy =

Answer 5

Useful Output Energy ÷ Total Input Energy
𝑬𝑷𝑬=𝟏𝟐𝒌𝒆𝟐

Question 6

Efficiency using outful energy and total input energy

Answer 6

Useful Output Energy ÷ Total Input Energy
𝑬𝒇𝒇𝒊𝒄𝒊𝒆𝒏𝒄𝒚=𝑼/𝑻 (𝒙𝟏𝟎𝟎%)

Question 7

Power using energy and time

Answer 7

P=Et
𝑷=𝑬/𝒕
Energy ÷ Time

Question 8

efficency using useful output power and total input power

Answer 8

Efficiency=UT (x100%)
𝑬𝒇𝒇𝒊𝒄𝒊𝒆𝒏𝒄𝒚=𝑼/𝑻 (𝒙𝟏𝟎𝟎%)
Useful Output Energy ÷ Total Input Energy

Question 9

Charge Flow

Answer 9

Q=I x t
𝑸=𝑰 𝒙 𝒕
Current x Time

Question 10

potential difference

Answer 10

𝑽=𝑬/𝑸
Energy transferred ÷ charge

Question 11

resistance

Answer 11

𝑹=𝑽/𝑰
Potential Difference / Current

Question 12

Time Period

Answer 12

T=1f
𝑻=𝟏/𝒇
1 / frequency

Question 13

Power

Answer 13

P=I x V
𝑷=𝑰 𝒙 𝑽
Current x Potential Difference