An object with a relatively 4m per second speed transmission belt, acceleration is 1m/s^2, the speed belt is 1m/s, and the motion in the opposite direction, now has a fixed point in the transmission A belt, A belt with mobile A, known distance of objects into the belt where the distance is 4m, for objects time to AIt's 4*T+0.5*1*t^2=4, but it really surprised me. Why is the speed 4? The relative speed of the belt is 3?But the teacher also said that this type of questions just to see, do not look at the transmission belt objects to relative 4 speed transmission belt, is calculated to 4? But always felt very contradictory? If so, then the people on the treadmill but practical and relatively static movement in motion
The speed of known objects and the speed of the belt are all referenced by the earth
People on the treadmill, different frames of reference can have different judgments, not contradictory. As for the earth, the house and the house of a sentence, then the sentence is the moon movement. This understanding with "things are relative, not absolute objective law."
The object and the drive belt is back to the line, the sports department is actually the muzzle velocity of uniformly accelerated motion, S = V + a - t / integrant.
