A-Level Maths: R4-07 [Forces: Pulley Example 2]

[laibakhan]

so in an exam would one show the working out for if m>8 and m<8 ?? or would it be mentioned in the question?

[arijitchakravarty]

excellent - super clear -thank you, sir!

[ToxicZerp]

To find the M when less than 8, I did 25/8 got the factor and then did 8/the factor and got the same answer as you. Does that always work?

[Globalz_Haqq]

is tension always same on both sides of a pulley?

[dawsonla]

Why do we not consider weight when finding the downwards force on the peg?

[revcs]

why would the tension in the string be different for different values of m?

[zesko]

sir please why did you take the force acting on the peg is 2 T

[tnrana]

Hi sir, aren't the acceleration directions the wrong way round? Shouldn't it be going down for the m kg particle and up for the 8 kg particle, when m>8

[Ethan-vuoy]

Hi, is there absolutely no way to determine whether m>8 or if m<8 ?

[tacituskilgore]

I have never come across question 3, is that a common question which comes up in the exam or not?

[glimmerpearl]

sir do we to write both the methods in the exam when soloing mass m?

[MoldingMatty]

Why is it g+5 and not g-5 as they’re acting in different directions?

[babajani]

Sorry sir but why cant the masses be the same because they could be the same but if one is closer to the ground then that one would cause and acceleration. Thank you.

[tzpzevu]

why is it 5ms-2 on both sides and not -5 and +5