- #1

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a) What is the tension in the rope

b) What is the acceleration of the block

I know that the tension isnt just F=mg and so am thinking it is combined with the mass of the block but dont know how to go about it

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- Thread starter emmaemma08
- Start date

- #1

- 2

- 0

a) What is the tension in the rope

b) What is the acceleration of the block

I know that the tension isnt just F=mg and so am thinking it is combined with the mass of the block but dont know how to go about it

- #2

LowlyPion

Homework Helper

- 3,097

- 6

Welcome to PF.

Consider the torque on the wheel.

What equations do you know for Torque?

Consider the torque on the wheel.

What equations do you know for Torque?

- #3

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i think it needs to use the ones related to angular momentum where torque= dL/dt= Id omega/ dt= I alpha

there was a similiar question but it just said the things and didnt really progress or confirm if it was right

- #4

LowlyPion

Homework Helper

- 3,097

- 6

i think it needs to use the ones related to angular momentum where torque= dL/dt= Id omega/ dt= I alpha

there was a similiar question but it just said the things and didnt really progress or confirm if it was right

OK. So you have

T = F * R = I * α

m*g*R = 1/2*M*R

but α = a/R

So ... m*g = 1/2*M*a

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