YUHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH gbghdwqygfywefyugsadfyuyuqwbhfbds hehrwuhuaijkfa
Answer:
A) The crossbeam is moving relative to the observer on the platform so the height appears contracted.
Explanation:
The observer on the train and the beam are in the same reference frame. That means observer on the train will measure the proper length of the beam not the contracted length . the observer is outside and the plank is in the moving system,it will appear to be moving.
Here, height is given which will be the distance for a freely falling object.
The velocity will be
and the acceleration will be
In this way, the formula works.
The forces of gravity between two objects are smaller when the objects are farther apart.
In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture.
