A plane is flying in a straight line,climbing steadily at a speed of 6m/s through still air.The net force acting on a passenger on mass M in the plane is?先给出答案,再详细说明为什么,

问题描述:

A plane is flying in a straight line,climbing steadily at a speed of 6m/s through still air.The net force acting on a passenger on mass M in the plane is?
先给出答案,再详细说明为什么,