Spring Arrangements

Question 1

When springs are connected in series the equivalent Spring constant =

Answer 1

1/k = 1/k1 + 1/k2

      k1.        k2
|-~~~~--~~~~~|_|
  \_\_\_
    |
    ? k1
    |
    ? k2
    |
   --
  |\_\_|

Question 2

When springs are connected in parallel the equivalent Spring constant =

Answer 2

k = k1 + k2

  k1.             k2 |-~~~~-|\_\_|-~~~~-|

\_\_\_\_\_\_\_\_\_\_\_
  |.        |
  ?        ?
  ?        ?
  |         |
 --------
 |.    m.    |
 |\_\_\_\_\_\_\_\_|

\_\_\_\_\_\_
    |
    ?
    ?
  ----
 |. m.  |
 |\_\_\_\_\_|