MJ20 P41/ P43 Q1 Binary Star Rotation | A2 Circular Motion | CAIE A Level 9702 Physics

[@KarsazKaJinn]

Thank you maam. You were a big help through out my AS level studies and now im using your videos as a resource for my A2 studies❤

[@The-KM14]

You explain so well!

[@MrEric-rs2wg]

Thanks a Ton.. Our CAIE A Level Physics Exam is at 10th of May.. Do pray for all the examinees.. 😁

[@SakinaMustafa-ds8ue]

Please explain why the force of gravitation=force of centripetal As centripetal force depends on the distance from the centre of the mass P and its own mass I'm confused please explain

[@ummmm55]

in the def of gravitational force can we use 'point masses'or would that be wrong?

[@indrajitbarua601]

Could you please explain Question # 6. M/J /41/20 Thank you.

[@nolife8209]

Why is it drawn as a sector and not a triangle? Talking about 1. b)

[@pakistanmidistrict5589]

im not getin answer for part (ii) using force of gravitation...not using force of centrepetal

[@ahmedsarker3555]

could you explain again in6:55 why is that gravitational force is same

[@trigobrooken6260]

Newtons 3rd ,hence you could say that centripetal force acting on rotating star is equal in magnitude but opposite in direction

[@ahmadjahanzeb3586]

Can we use mv^2/r in the Question 1 to find ratio? Because I am not getting the right answer.

[@ETphysics]

it is because the tangential speeds (v) for both stars are not the same. Only their angular speed is.

[@adinfatima3865]

how did 2.5 in part ciii (d=2.5x) become 2/5? shouldnt it be d/2.5

[@adinfatima3865]

pls help im really bad at math

[@Random-ez8kv]

@@adinfatima3865 basically d=2.5x becomes x=d/2.5 or you can even write this as x=2d/5

[@amnakhalid4600]

its what u said . basically u do 1/2.5=0.4 so d/2.5=0.4d its the same thing u will get the answer whatever u use