A spring used in a mattress has a stiffness of 67 N/m . Calculate the force that will compress it by 6.3 cm.
| Data statements | k = 67 N/m x = 6.3 x 10-2 m |
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| Formula | F = k x | |
| Transposition | (not needed) | |
| Substitution | F = 67 N/m x 6.3 x 10-2 m | |
| Evaluation | F = 4.2 N | 4.221... has to be reduced to 2 SF. |