This man just cleared up in 3 minutes the thing I couldn't figure out in over two hours. Thanks for your help, I will definitely be coming back to your channel for other topics
Best physics lectures I have seen on RUclips, thank you! But on this one, I don't understand why phi + beta necessarily = 90 deg. It appears that beta depends on theta, which could vary. For example, if theta was very large (say, 80 deg) then beta would be very small (10 deg), and phi + beta would appear to be much smaller than 90 deg.
I was "attempting" to draw the perpendicular to the incline, meaning that by definition it makes a right angle hence phi + beta = 90 deg. My fault if that didn't come across. Cheers, Dr. A
Another way of thinking about this is that the sin component of g on the bottom is parallel to the incline (to make the vectors equal) So, co interior angles have to be supplementary, which means that phi + beta + 90 = 180, so phi + beta = 90
You might have known it now, but if not, we take g as positive because gravity acts downwards. If the component were to say vertically upwards, we would take g as negative
This man just cleared up in 3 minutes the thing I couldn't figure out in over two hours. Thanks for your help, I will definitely be coming back to your channel for other topics
Thank you soo much for clearing up my misunderstanding in seconds professor!!!!
Wow, seconds? Well done.
Cheers,
Dr. A
I'm extremely grateful for this video. Thanks a lot for explaining this.
my brain was gonna explode until i cam across this, thank prof : )
Excellent. Here's to keeping the gray matter contained.
Cheers,
Dr. A
Wow really needed this, thanks!
Best physics lectures I have seen on RUclips, thank you! But on this one, I don't understand why phi + beta necessarily = 90 deg. It appears that beta depends on theta, which could vary. For example, if theta was very large (say, 80 deg) then beta would be very small (10 deg), and phi + beta would appear to be much smaller than 90 deg.
I was "attempting" to draw the perpendicular to the incline, meaning that by definition it makes a right angle hence phi + beta = 90 deg. My fault if that didn't come across.
Cheers,
Dr. A
Gotcha, thanks! @@yoprofmatt
Another way of thinking about this is that the sin component of g on the bottom is parallel to the incline (to make the vectors equal)
So, co interior angles have to be supplementary, which means that phi + beta + 90 = 180, so phi + beta = 90
thank you so much
Sir but in formula a = g sin°. Why mass 'm' is not there
Finally i got it
Thanks for the physics lectures. Should this Force down the incline, really be "-g sin(theta)"?
You might have known it now, but if not, we take g as positive because gravity acts downwards. If the component were to say vertically upwards, we would take g as negative
are you writing backwards?
Cheers indeed, very succinct and helpful sir. The mathematical phi=beta proof was beautiful, thank you very much for your efforts!!
You are most welcome.
Cheers,
Dr. A
thanks alot
Had to come here from pearsons because the video just added more questions lol
Welcome aboard. These videos are also on Pearson, of course.
Cheers,
Dr. A