# Torque and circular motionWatch

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Thread starter 2 years ago
#1
Hi here is the link to the question http://filestore.aqa.org.uk/subjects...4-QP-JUN15.PDF

The question i'm stuck on is 1 b ii) The mark scheme says "Angular acceleration, α = 3.6 / 20 OR 3.59 / 20 or 0.18
or 0.1795
3.8 (3.77, 3.78) × 10^4 "
It's a spec B paper (not my spec) but i'm pretty sure i haven't come across angular acceleration so i'm just wondering which equation to use
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2 years ago
#2
(Original post by tasha1898)
Hi here is the link to the question http://filestore.aqa.org.uk/subjects...4-QP-JUN15.PDF

The question i'm stuck on is 1 b ii) The mark scheme says "Angular acceleration, α = 3.6 / 20 OR 3.59 / 20 or 0.18
or 0.1795
3.8 (3.77, 3.78) × 10^4 "
It's a spec B paper (not my spec) but i'm pretty sure i haven't come across angular acceleration so i'm just wondering which equation to use
It is like the "normal constant acceleration" or what people like say SUVAT equation.

v = u + at

ωf = ωi + α t

where ωf is final angular velocity or final angular speed,
ωi is initial angular velocity or initial angular speed,
α is angular acceleration.
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Thread starter 2 years ago
#3
(Original post by Eimmanuel)
It is like the "normal constant acceleration" or what people like say SUVAT equation.

v = u + at

ωf = ωi + α t

where ωf is final angular velocity or final angular speed,
ωi is initial angular velocity or initial angular speed,
α is angular acceleration.
ohhhh that makes sense i never think about these things logically haha thank you!
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