00:01
For this question, we're told that we have a block, which i call m1 of 0 .7 kilograms, so that's the mass of block one, attached to a spring, which is attached to a ceiling.
00:11
We then hang a second block from the first one, and we're asked to find the amount the string stretches from the second, or we're told that the amount the string stretches from the new block being hung is three times the original amount, and we want to find the mass of the second block.
00:26
So we're using hux law where it says that the force here, f, is equal to k times delta x.
00:35
So for the first situation, when we only have the first block hanging from the spring, we have m1 times g is equal to k times delta x.
00:50
Or in other words, we have k is equal to m1 times g, or g is equal to g, or g is just the acceleration due to gravity divided by delta x.
01:03
Okay, so now for the second system, we have a new force we'll call f prime, and that's equal to, also it's the same spring, so it's still k, but this is multiplied by delta x prime, the new displacement...