Projectiles and equations of motion - Mechanics 1 for A-level

[debseun]

You near enough just saved my life, thank you so much for this!

[glennrickelton]

A very helpful video which is easy to follow. One minor criticism is that at the 1 minute 30second point you said UY = 40 sine 20 degrees = 20 but omitted the multiplication of 1.5 seconds to arrive at the answer (may cause confusion to anyone new to this).

[MathslearnCoUkvideos]

Thank you for the comments, and will bear them in mind. I intend to do some alternative approaches and will bear in mind your comment. Personally, I tend to use vector notation in brackets and will produce a video on such relatively soon.

[MathslearnCoUkvideos]

Thanks for the message. You are correct if talking about displacement from ORIGINAL position. If talking about position with respect to a different origin then we need to factor in the original displacement from this origin. In this case we needed a +1.5 because it began 1, 5m up from the floor and I took the point on the floor as my origin. Hope this partially helps

[ravirajmohan]

This is so good, I used to find projectiles hard but this was so helpful. 
Thank you very much

[Markus]

But when do you use the vertical component, and when you use the horizontal component? Why did you use the vertical component to find how high the ball gets, and to find the range you took the horizontal component? thanks, nice video :)

[nataliemoini]

This is a really stupid question but i'm getting really confused. If cos is a/h why is the first vertical component cos? if using sohcahtoa, isn't it sin? I can't get my head around that!

Thanks

[markfencingman]

How would you calculate the speed with which the ball hits the ground on the far end ? Thanks

[irishhead]

He never said the first vertical component is cos, he has it written down next to the diagram as sin and says its sin.

[DukuNChu]

The way you're structuring the horizontal and vertical motions are a bit complicated....I think you should have explained the horizontal and vertical accelerations and also explained that if you integrate acceleration, you get velocity and if you integrate velocity, you get displacement. But everyone has their own ways so yeah, nice work anyway

[Tonyupnorth]

you are provided a formula sheet, but it never hurts to memorize formula's.