- #1

co0ldood

- 8

- 0

Here’s my scenario:

I have a forklift and a pallet with a box on top. I’m trying to calculate the required velocity for the box+pallet to flip around a turn.. and at what angle. Pictures have been uploaded to visualize the problem better.

http://img.photobucket.com/albums/v114/Co0lDood/prob.jpg

Here are my following assumptions:

- Forklift is 100% capable of carrying this load (forklift will NOT tilt on the turn and I can neglect the forklift all together)

- Box is latched down to pallet creating a rigid body.

- Center of gravity (CoG) is directly in the middle of the box.

- The fork lift is at constant velocity (acceleration = 0), which makes centripetal force only acting in the normal direction into the curve.

- No slipping will occur between the fork and the pallet + box.

Known

- I can calculate the velocity, radius of curvature, and all dimensions of the box/pallet.

Centripetal force is Fc= (v^2)/r (in the normal direction toward the curve)

Centrifugal force is the same in magnitude but is acting on the opposite direction at the CoG.

I calculated the angle of when my rigid system will fall over by having the CoG align vertically to point P (as seen in picture) in a static situation.

How would I go about calculating how much force is required to have my rigid body reach the angle I calculated? (so my pallet + box will flip)

I have thought about calculating the moment at point P and CoG (Sum of moment at a point in the free body diagram and equaling it to the sum of moments, at the same point, in the mass-acceleration diagram or kinetic diagram), but I can’t seem to relate it with everything else.

I'm not sure how to go about calculating angular acceleration either.

Can't seem to put everything together. I don’t think I have left anything out.

Any theories or comments would be

*greatly*appreciated. Thank you for your time!