When a motor vehicle meets a pedestrian and is passing through a crosswalk, it shall ( ). A: detour through B: stop and yield C: acceleration ahead of time through D: honking through

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.

For a point on a spinning disc in uniform circular motion, which of the following is not constant? A: It's angular speed B: It's angular acceleration C: It's centripetal acceleration D: The magnitude of it's total acceleration E: None of the others

Acceleration relates to motion. It m________ a change in motion.

中国大学MOOC: __________ we are calculating is the instantaneous acceleration of the particle.

The direction of the acceleration(加速度), as has been pointed out, is the same as that of the change in velocity.

（ ）we fail, we trying（ ）. A: Even if, will not stop,Even though, will stop,Even, will not stop,Even if, will not stop to

The acceleration(加速度) is directly proportional to(正比于), and in the same direction as, the applied force(外力).

The C919 project,helping trigger an acceleration in the global aviation industry,hastaken three decades.

It ensures passengers feel only slight at a curve. A: lateral acceleration B: compromise figure