3.27 | A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the
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- Опубліковано 12 вер 2024
- A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. (a) How long is the ball in the air? (b) What must have been the initial horizontal component of the velocity? (c) What is the vertical component of the velocity just before the ball hits the ground? (d) What is the velocity (including both the horizontal and vertical components) of the ball just before it hits the ground?
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Thank you for this. I'm not very compatible with my professor's teaching style as a student who struggles with physics, so watching you explain everything is really helpful.
I am so happy that these videos are helping you in your Physics class! Keep working hard and it will get easier as you understand more about the subject. 😀
omg i love you, teacher never teaches, and does not go over homework. I just found all the videos for my homework question. Glad to find this in the beginning of the year. Savior!!!!
This is great to know! I am so glad that you found this channel and that it is helping you in your Physics class. Keep up the great work and help us spread the word in your class! 😀
The sign you use for answer C is dependent on what you define your coordinate system as. If you define up as positive, than your answer would have a negative sign in this case.
You have saved my life. I hate physics.
You got this, Trisha! Keep up with practicing Physics and using these videos as a guide! Make sure you understand your x and y components thoroughly because this is essential for Physics! Keep going, I believe in you!
is that we can use the formula of x by y component is this case? Can you explain more why we can use it please, thank you
For C could Vo = Vo + at also be used to figure it out? Is there any specific reasoning to using the equation you did?
2(9.8)(60)= 1176 not 1180. Why is it round up?
For the simplicity of the video, some intermediate answers have been rounded but keep in mind, on a test or quiz it is best to only round at the final answer. Hopefully this helps!
How come you round the numbers before you get the answer? I have been told to keep my answers unrounded till the very end.
Hi Gabi! Abiding by Significant Figures are very teacher/professor specific. Some professors/teachers don't care about them, but others are super strict and they only want you to round at the end. Me personally, I don't care about sig figs 😂 so I will sometimes round to make the numbers easier to work with. You should just make sure what your professor/teacher wants and abide by their rules regarding it. Generally, significant figures do apply only to the final answer. Hopefully this helps!
Would it not be easier on part c to just use the first equation for it since it uses initial, final, acceleration, and time?
At 8:00 I explain why I prefer to use Equation #4. At this point in the problem, you can choose either Equation #4 or #1. Regardless of which equation you use, both methods require only one step since only one equation needs to be used. You reduce the likelihood of error by using Equation #4. Cheers!
Is letter D not in component form? I have my professors answer is something with x and y hats with 28.6x^-34.4y^=v^ and im confused
Hi Ian - The answer to D in the video is the total Resultant (Hypotenuse) of the components (x and y). The hats you are talking about are just Physics notation to say that the value you're describing is a VECTOR. If you want to leave it in component form, you do not have to perform the math to find the overall resultant but just state the components of the resultant vector. The 28.6 is the x-component (x hat) and the y-component is -34.4 (y hat). For this video I stated that the x-component was 28.7 but this is just a difference in rounding. Hopefully this helps!
@@GlaserTutoring This helps a lot! thank you
@@IanTimothyHargrove You got it, Ian! 😀
Hi, I’m confused how you got the -9.80?
-9.8 m/(s/s) is the acceleration of gravity. You could also do +9.80 m/(s/s) and +60m
@@danielkennen1307 oh I see now, thank you!! ❤️
Teamwork makes the dream work! 😀
c is wrong the answer should have been negative, thanks anyway
It is negative??
@@Wojtekoa yes because the final velocity in the Y axis was going downwards which makes it negative, I think he mentioned it I just wasnt paying attention