How to solve EVERY work energy problem in physics: An example with a spring loaded launcher.

OK, not EVERY work-energy problem - but this should help.

[gkollarics]

Nice presentation.
I believe, at the end of the first sheet, you forgot to modify the second "s" (at the very end of the equation) to 0.03m.
It would also be useful to see how units align.

[audreywineberg]

Not sure how but I calculated the height for your first question using the same calculator and the original values (25 N/m and 1 cm). I ended up getting a height of 0.015 m or 1.5 cm. Its not very high but it is higher than the result you were getting.

[estebansanchezsevilla]

I thought gravitational potential energy is simply divided by r and not r squared

[spencergee]

I really find the fact that people cannot hold a pen correctly most irritating. Here, as in other videos, what is being written is obscured by the redundant thumb. Apart from that I hope none of you contract Covid in any of its forms.