Recent content by droidofthevoid

Well then, I would presume it would have something to do with torque and perhaps treating the thrower as a rigid body? or radial acceleration, which would be omega squared times r.

So then I treat it as a particle going in a circle and use a = R alpha? Do I neglect the omega= 3.0 rad/s?

Homework Statement A discus thrower ( with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with a constant angular acceleration of 2.5 [rad/s^2]. What is the magnitude of the total acceleration of the discus when its angular velocity is 9.0[rad/s]? Homework...

well, I found an equation of a= (v^2)/2 i, which gave an acceleration of a = 8 m/s i. I don't understand how this equation was derived. Although, now that I have actually thought about this, the acceleration vector around a curve or a circle always points toward the center of the circle and...

Yes, that is correct and an error on my part. well, if the velocity at r(t)= 0 i +2j is 4(m/s)i, then I would assume it is going in the clockwise direction because of the i vector. if it had been -4(m/s)i, then it would be in the counter clockwise direction.

I believe I had done it correctly, I got r(t) = 0i + 2j

Homework Statement A particle moves with constant speed around a circle. When it is at the top of the circle, its coordinates are x=0 and y=2 and its velocity is 4(m/s) i. When it reaches the left hand of the circle, where its coordinates are now x=2 and y=0, what is its velocity and...

Awesome! Thank you again!

Yes, I am aware of the Torque vector notion. I was just a little thrown off because I had a question where clockwise motion was chosen as positive as opposed to negative. Instinctively I assumed that any answer found in the positive clockwise direction would be of opposite value in the...

Thank You

My question arises from trying to get the correct sign convention for a pulley that has two boxes attached by a massless rope. one box is to the left of the pulley and the other box is hanging down below the pulley. If I take the counter clockwise direction to be negative, and set up my...