Which of the following ideas is helpful in understanding projectile motion?
选项:
A:The horizontal motion is independent of the vertical motion.
B:The velocity of the objects is zero at the point of maximum elevation.
C:Acceleration is +g when the object is rising and -g when falling.
D:In the absence of friction, the trajectory will depend on the object’s mass as well as its initial velocity and launch angle.
发布时间:2024-04-24 16:03:24