Scioly.org

We are planning to use a sand timer device to activate a wheel and axle (which will lift an object >10 cm). Will the sand collecting after falling through the wheel be a dead end path?

Will a pulley with ima>2 count for scoring if using to raise the flagpole? The distance from resting parallel to the ground and where it is attached to the flagpole when fully raised is 11 cm. Also, since the flag is the finial task, and the height can go beyond the 60 cm, will the height raised ...