I think the situation is modeled by the scenario in the attached image. Some specific values seem to be missing (like the height of door )...
The door forms a right triangles that satisfies
We also have
so if you happen to know the height of the door, you can solve for and .
is fixed, so
We can solve for the angular velocity :
At the point when and ft/s, we get
Explanation:
At the top of the tree, the velocity of the pebble is purely horizontal so we can calculate it as
Answer:
person when the point-light walker is moving
Explanation:
A point light walker is an arrangement of dots that moves in a way that mimics a human walking. This is used in the field of Biological Motion Perception.
Biological motion perception is the science that deals with how our brain perceives motion. In order to understand how the brain perceives motion a point light walker is used.
Answer:
Snell's Law states
Ni sin i = Nr sin r
Judging from the question the source of the ray is in the water (directed up)
or NI = 1 / sin 49 Ni = 1.325 deg the critical angle
From inside the pond:
Nr = 1.325 * sin 45 / 1 = 94 deg
So refraction can occur outside the pond and you do not have total internal refection.
It is a stretch of the atmosphere ranging from the upper mesosphere to the lower parts of the thermosphere. It’s useful to us in radio communication.