31. A circular orbit ( be it planet or electron ) is the shortest orbit with the most constant velocity . 32. X-waves are special superpositions of Bessel beams which travel at constant velocity , and can exceed the speed of light. 33. Then the Lorentz transformations give the corresponding properties in a frame moving relative to the object with constant velocity . 34. One plate, say the top one, translates with a constant velocity " u " 0 in its own plane. 35. Additionally, NTN Driveshaft do Brasil and NTN Noto Corporation were formed for constant velocity joints and industrial machinery bearings. 36. Moreover, any object traveling at a constant velocity must be subject to zero net force ( resultant force ). 37. Assuming the balls travel at a constant velocity and the pitcher is stationary, the catcher catches one ball every second. 38. The point on the crankshaft which connects to the connecting rod, rotates smoothly at a constant velocity in a circle. 39. Einstein extended special relativity to include motion not at constant velocity and created what is called " general relativity ." 40. Alternatively, one can use the power input to the system P used to move the system at a constant velocity v.