كرة كتلتها و 200 مربوطة بنهاية خيط طوله m 1 تتحرك حركة دائرية منتظمة في مسار دائري افقي ، اذا كانت الكرة تدور دورتين في الثانية ، فإن مقدار قوة الشد في الخيط بوحدة النيوتن تقريبا
تساوي :

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

How is the gravitational force related to the distance between two objects?