What is the difference between above and below the horizontal?

In summary, the question is asking about the difference between velocity above and below the horizontal. The given scenario involves a child throwing an apple core at a 35 degree angle above the horizontal from a tree, and the question is whether this angle is 35 degrees or 55 degrees. The explanation is that the angle is measured with the horizontal line as the reference and something thrown horizontally has an angle of zero degrees.
  • #1
kitkat87
6
0

Homework Statement


Some of the questions in my homework list the velocity either above or below the horizontal. I am confused as to what the difference is.

This is the question:

"A child sitting in a tree throws his apple core from where he is perched (4.0 m high) with a with a velocity of 5.0 m/s [35 DEG above the horizontal], and it hits the ground right next to his friend.

Does that mean it's a 35 DEG angle or does it mean its a 55 DEG angle?

Homework Equations

The Attempt at a Solution

 
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  • #2
kitkat87 said:

Homework Statement


Some of the questions in my homework list the velocity either above or below the horizontal. I am confused as to what the difference is.

This is the question:

"A child sitting in a tree throws his apple core from where he is perched (4.0 m high) with a with a velocity of 5.0 m/s [35 DEG above the horizontal], and it hits the ground right next to his friend.

Does that mean it's a 35 DEG angle or does it mean its a 55 DEG angle?

Homework Equations

The Attempt at a Solution


Imagine a horizontal line is drawn from the child extending outward.

As the child throws the apple core at an angle above the horizontal, there is a vertical component of the velocity which is positive upward.

If the core is thrown at an angle below the horizontal, the vertical component of the velocity is negative downward toward the ground.

Angles are measured using the horizontal line as the reference, so something which is thrown horizontally has an angle of zero degrees.
 
  • #3
Thank you for clarifying :)
 

Related to What is the difference between above and below the horizontal?

1. What does it mean for something to be "above" the horizontal?

"Above" the horizontal refers to a position or direction that is higher or further away from the horizontal plane, which is the imaginary line that runs parallel to the ground.

2. How is "below" the horizontal different from "above"?

"Below" the horizontal refers to a position or direction that is lower or closer to the horizontal plane. It is the opposite of "above" in terms of distance or height from the horizontal line.

3. Can you give an example of something that is above the horizontal?

Sure, an airplane flying in the sky is above the horizontal, as it is higher than the ground. Similarly, a bird perched on a tree branch would also be considered above the horizontal.

4. Is there a specific angle that distinguishes above and below the horizontal?

No, the terms "above" and "below" the horizontal are relative and do not refer to a specific angle. It depends on the context and reference point of the object in question.

5. How does the concept of "above" and "below" the horizontal apply in physics?

In physics, the terms "above" and "below" the horizontal are used to describe the direction and magnitude of forces acting on an object. For example, a force acting downwards would be considered below the horizontal, while a force acting upwards would be considered above the horizontal.

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