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Results tagged with homework-and-exercises
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user 176359
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.
0
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Screw falling in an elevator
First of all, the equation of motion is $s = ut + \frac{1}{2} at^2.$
As the elevator is moving upwards and $g$ acts downward,
resultant acceleration = $g-(-a)$ = $ g+a$ which is in the downward dire …
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-3
votes
1
answer
273
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Projectile motion question : time at which velocity v becomes perpendicular to initial veloc... [closed]
A projectile is thrown up with the initial speed u, making an angle theta (theta > 45 deg) with the horizontal. What is the time, just after which, it will be moving perpendicular to its initial direc …
- 53