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Results tagged with homework-and-exercises
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user 252833
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
2
votes
Why the kinetic energy formula is true for the final velocity?
The formula $$W = Fd$$ is only true for a force that does not change over a distance or an average force over a distance. Let's derive kinetic energy in a general way using some calculus.
Suppose we …
- 61
2
votes
Is this a viable way to calculate the mass of the sun?
Earth's distance from sun: $ R $
Orbital period: $T$
Sun's Mass: $M$
Earth's mass: $m$
Newton's Law of Universal Gravitation: $ F = \frac{GM m}{r^2} $
Newton’s 2nd Law: $ F = ma$
Okay, let's s …
- 61