a force of gravity 这个短语中的force 不是不可数吗?

a force of gravity 这个短语中的force 不是不可数吗? 英语翻译The gravity force of a space object depends on its mass. Newton proved that it is ______ the moon is pulled out of a straight path and kept in orbit.A.by the force of gravityB.by the force of gravity whichC.by the force of gravity thatD.by the force of gravity with which 求译：Does centripetal force of the force of gravity bring orbiting bodies to the earth's surface? 翻译 The force of gravity pulls things towards the earth's center. weight is the force of gravity acting on an object 求翻译. 求翻译In the LEO,the force of gravity decreases upward by 0.33 μg/m The force of gravity actd only while objects are moving ownwards.要翻译. 请问此句子中to restore...不定式短语的逻辑主语应该是them (waves) 或是force (the gravity of the earthOnce ocean waves have been generated,the gravity of the earth is the force that them in a continual attempt to restore the ocea su The weight of something is another way of describing the force on ___ by gravity.A it B them Cthat Done我知道答案是A,并求翻译, 英语翻译Magnet force-stroke curve for bottom nameplatevoltage and solenoid temperature of 90VA-stroke curve for top nameplate voltage,20 ambientIf plunger works with gravity:stroke force= magnet force+ plunger weight force.If plunger works agains love is a force of nature是什么意思 What kind of force is the force on the student by the backpack?A gravitational force.A nuclear force.An electromagnetic force.三个选项 选哪个? Please translate.thank youWe may take it for granted that it exists just like air around us,or the force of gravity,or other natural happening. 关于小车斜面原题：Determine the stability of a quad on a 20E slope in pull condition.the mass of the quad is 10000kg.The distance between the front and the rear axis is 4m,and the overall force of gravity for this quad is located 1.5m frome 英语翻译Chapter1-Balance Personal balance and Exercises Couple balance and Exercises Chapter2-Balance of Movement Four forces;Gravity,Inertia Centnipetal Force,Centnfugal Force Motion Total joint coordination Chapter3-Communiction Mechanical Emot the theory of gravity是什么意思 established the law of gravity