A-Level Maths: Q5-12 Projectiles: From a Height Example 1 SUVAT Method

[@tee.x3469]

Thank you so much, probably couldn't have done it without your help. Loved every single video and I agree I will continue watching the videos just for fun, thanks again Jack!

[@PianoBoy-my4ne]

For (b), why not set the displacement = -1.8 in the first place which is found by looking at the trajectory on diagram, and then setting this equal to the ut + 1/2at^2 in order to avoid missing the extra 1.8 in the later steps? Is this not easier?

[@TLMaths]

Either or. I'll let you make that video. :-)

[@puddleduck1405]

yeah I did that and got the same answer as him

[@RB-nh1om]

if I took downward as positive direction would the velocity be -26sin48ms-1 instead of 26sin48????

[@TLMaths]

Yes

[@Diesel1234510]

I've noticed through a few of these SUVAT questions that if my method is slightly different from yours, I get a slightly different answer but the answer is still very close to what you got. For instance, here I got 71.615773m for (b). Does this mean my answer is wrong or is it the case that different methods yield slightly different results?

[@TLMaths]

You should get the same answer regardless of method. Either you’re using a different value for gravity and/or you’re rounding early and that’s having a knock on effect to the accuracy of your final answer

[@RB-nh1om]

which method;intergration or suvat would be better to use in a q like this

[@TLMaths]

I currently have a preference for SUVAT as it's how I've been teaching it

[@cowgate]

Tricky question!