Answer:
Explanation:
In the vertical, air resistance reduces the maximum height attained and therefore also the time of the flight.
In the horizontal, air resistance reduces the range due to direct action and indirectly because the time of flight is reduced due to vertical air resistance.
Whenever there is a change in velocity, either due to a change in speed or a change in direction, there will be non-zero acceleration. ... Acceleration is not constant if the net force is not constant.
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Answer:
remain stationary
Explanation:
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
Answer:
Explanation:
The change of frecuency of sound due to the movement of the source is colled Doppler Effect.
As James (the source) is running toward the wall, the frecuency reaching the wall (so the eco sound) will be higher than the source. In this case the frecuency at the wall will be:
where is the speed of source, 2 m/s
and is the speed of sound, given that we have wind movind the air in the opposite direction respect to the wall, the speed of sound would be:
Replacing the values:
Now the wall becames the new source, and James (the observer is aproaching the source), for an observer aproaching the source the new frecuency will be:
Now the waves are traveling in the direction of wind, so the velocity of sound will be:
Replacing: