But但是。根据上文“as was the case where my students built an enormous roller coaster and could not create a loop with enough centripetal force to allow the cars to move along the track safely(就像我的学生们建造了一个巨大的过山车,却无法形成一个具有足够向心力的环,使汽车能够安全地沿着轨道...
The everyday experience of acceleration is in a vehicle. You step on the accelerator, and the car speeds up as increasing force is applied to the drive train by the engine. But deceleration is also acceleration - the velocity is changing. If you take your foot off the accelerator, the for...