+A Level Physics Online You have absolutely no idea what your videos mean to student like us... On Behalf of many students like me... Thank you your noble effort...
Love the military themed context to these videos!! Really helps to understand projectile motion and suvat and makes it way more fun. Also really interesting to know how this type of physics is applied to weaponry like artillery!!
You are the definition of a savior, I have mocks this week and all i needed was a slight recap, you are an inspirational human being and there needs to be more people like you
Thanks a lot you almost saved my life I was like crying because I couldn't solve a question in my assignment, but now it seems I got it after all. keep it up . thumbs up ;-)
quick tip, at 3:52 you can find the horizontal range (s) with one quick formular this only works if the projectile motion is symetrical so no change in starting height and if air resistance is NOT taken into account. The formula is R = v^2 x sin2(theta) over g sol 300^2xsin(2x30) over 10 = 7794m
apparently one can find the maximum projectile displacement using a single equation : 1.225 * (change in time) ^2. Is this true and if not is there a different formula?
+Jack Devin This is the danger when not using standard form. 300m/s could be to one, two or three significant figures and 30 degrees could be to one or two. But generally trailing zeros count as significant figures. In this videos I should only have given my final answers to 2 sig fig (but any intermediate steps should always be kept to the value calculated).
+A Level Physics Online I'm not sure if it's just my specification (AQA), but they explicitly state in their 'Practical handbook' (How fancy), that trailing zeros as you referred to them as, don't count as significant figures as that could be wrote as (3x10^2) - 1 sig fig, and my Maths exam board portray the same idea. Although, it could be argued that giving your answer to 3 sig fig was completely acceptable as the data book value of g was given to 3. The pedantic side of Physics, I suppose. On the note of Physics, anyway, your videos are brilliant and some of the best made I've seen. Your students are very lucky!
+Jack Devin I can see how a discussion like this opens up a whole can of worms. Stick with what your AQA exam board use. I should have given my data in standard form and this would have made it very clear the exact values used. You should only give your answer to the least amount of significant figure in the question, so even if 'g' is given as 9.81 the answer I should have given would be to two significant figures (provided the angle was actually to two significant figures as well). If you've been using Isaac Physics then you will be well practised in the correct number of significant fugures. Thanks for the comments on the videos - it has taken a great deal of time!
Hey I have always wondered, How many sig fig shall I give? I don't wanna give the wrong amount. Is it usually 3sf? Or does it depend on the max num sf in the question
+Mahmzo Give your final answer to the least amount of significant figures quoted in your raw data. So if your raw data had values to 2 sf, 3sf and 4 sf then you could only justifiable give your final answer to 2 sf.
How do we solve this if we don't want to find the maximum height. I feel as if we would get more information for the horizontal S or horizontal T if we just wanted to find where the bullet land or would we always have to split the motion of the projectile into two separate parts?
Hi, Why is this: 8:54 ? Can you explain it further to me please? Do we assume projectile motion as symmetrical at Alevel (OCR)? I have asked chat gpt about this and I feel a little confused.: Chat GPT: ' No, an upward projectile motion is not symmetrical. Projectile motion refers to the motion of an object that is launched into the air and moves along a curved path under the influence of gravity. In an upward projectile motion, the object is initially launched vertically and then follows a parabolic trajectory as it rises and falls back down. The trajectory of an upward projectile motion is not symmetrical because the time taken to reach the maximum height is different from the time taken to descend back to the initial level. This is due to the influence of gravity, which affects the object differently during the ascent and descent phases. During the ascent, the object slows down due to the opposing force of gravity until it reaches its peak height. On the descent, the object accelerates under the influence of gravity, increasing its velocity as it falls back down. Therefore, the upward projectile motion is asymmetric in terms of time, velocity, and displacement, as the ascent and descent phases are not symmetrical.'
ik this is kinda late, but for this topic, we assume that there's no air resistance or any other external force acting on the projectile so yea, projectile motion will be symmetrical
Depends on what YOU decide is the positive or negative direction so if you chose up as positive then your g will be negative ofcourse as it is always acting downwards. Hope that helps :)
hello im writing my MAths IA and i will do it about kind of the same topic and i would like to know if there is a formula ?? no just formulas from physics?
+jakey12369 Do you have an example? When you write down suvat for both the horizontal and vertical parts of the motion just make sure you calculate the initial velocities using the angle given. Does that help?
Om Merchant Sin(theta) = Opposite/Hypotenuse Rearrange to give Opposite = Sin(theta) x Hypotenuse And the vertical motion is the opposite as it is opposite theta.
+LeGunslinger This is how I teach it in the UK for A Level Physics. It can be solved with integrals but not every student in the UK also does A Level Maths and the Mechanics modules so they don't all know about integrals. This method works well - it takes a lot of practise though to really understand projectiles.
A level physics is VERY confusing (maybe I shouldn’t hv picked it but oh well)... its like they teach u stuff and u cant question it. The more questions u ask the more complicated it gets. We’re soo brainwashed dat if my physics teacher pointed at a while table and said it was black, I wouldn’t question it.
