如果制造商拥有完全信息(perfectinformation),他们将最可能实施以下哪种策略: A: 超高效率(hyper-efficient)策略 B: 无摩擦(frictionless)策略 C: 流线型策略 D: 牛鞭策略 E: 准时制策略

As a block slides down a frictionless incline, which of the following statements is true? A: Both its speed and acceleration increase. B: Its speed and acceleration remain constant. C: Its speed increases and its acceleration remains constant. D: Both its speed and acceleration decrease. E: Its speed increases and its acceleration decreases. F: None of these.

A mass m is resting on a horizontal frictionless surface attached to a spring of spring force constant k . At time t = 0 , the mass is given a sharp blow, causing it to move the right with speed v . The next time the mass will have this speed is _________________ . A: [img=87x39]1802eac7b3965ae.png[/img] B: [img=91x46]1802eac7bbd36d7.png[/img] C: [img=85x45]1802eac7c49f55d.png[/img] D: [img=109x49]1802eac7d08bb09.png[/img]

Block A has mass 1.00 kg and block B has mass 3.00 kg. The blocks collide and stick together on a level, frictionless surface.After the collision, the kinetic energy (KE) of block A is A: 1/9 the KE of block B B: 1/3 the KE of block B C: 3 times the KE of block B D: 9 times the KE of block B E: the same as the KE of block B