An apple falls from a tree. Its position, at 0.3 second intervals, is shown below. At 0.0 seconds, the apple has not yet fallen,
and at 0.9 seconds, the apple is about to hit the ground.
At which time does the apple possess the least potential energy?
options:
0.0 seconds
0.3 seconds
0.6 seconds
0.9 seconds
At which time does the apple possess the least potential energy?
options:
0.0 seconds
0.3 seconds
0.6 seconds
0.9 seconds
2 answers:
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Answer:
Explanation:
The tidal current flows to the east at 2.0 m/s and the speed of the kayaker is 3.0 m/s.
Let Vector is the tidal current velocity as shown in the diagram.
In order to travel straight across the harbor, the vector addition of both the velocities (i.e the resultant velocity, must be in the north direction.
Let is the speed of the kayaker having angle \theta measured north of east as shown in the figure.
For the resultant velocity in the north direction, the tail of the vector and head of the vector
must lie on the north-south line.
Now, for this condition, from the triangle OAB
Hence, the kayaker must paddle in the direction of in the north of east direction.
