# Desperate for help -- studying an angular motion problem

• Hyburn
In summary, The speaker has failed their strength of materials and dynamics courses twice due to the college's accelerated time frame. They are currently not enrolled in these courses but are trying to understand the concepts to prevent failing again. They are attempting to determine the force acting on a receiver when a slender rod with a mass of .033KG rotates 15 degrees in 60 seconds and comes to a complete stop. They have calculated the angular acceleration and are unsure of what calculation to use next. They have tried using the parallel axis theorem and the kinetic energy equation, but are still unsure of the next step. They are asking for advice on which formula to use and which element to solve for.

#### Hyburn

hi folks, my back story is that I have failed my strength of materials and dynamics twice. the college I am attending put these courses in an accelerated time frame... this means 14 weeks of material turned into 7 weeks of material. I am not able to learn at that pace, hence why I failed twice.

I am not in these courses right now, but am trying to grasp the concepts so it doesn't happen again.

currently I am trying determine the force acting into a reciever when a slender rod with a mass of .033KG rotates 15degrees in 60 seconds and comes to a complete stop. the radius of rotation is .2542m

my calculations:
Omega=(theta)/t
=15/60
=.25 <<--------is this correct?

with this I can determine my angular acceleration:
(alpha)=dw/dt
=.25/60