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Physics of Threshold Angles

The experiment aimed to determine the threshold angle, which is the minimum angle at which tilted objects begin to slide due to gravitational force. The experiment measured the threshold angles of different objects - a block of wood, glass of water, and can of water - placed on a tilted cardboard surface. The block of wood had the highest average threshold angle of 35 degrees, while the glass and can of water had average threshold angles of 25 and 11.67 degrees respectively. The threshold angle depends on the frictional forces between surfaces in contact and the type of materials, with rougher or heavier materials requiring a greater tilt angle before sliding. Understanding threshold angles relates to Newton's laws of motion and gravity.

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Jovella Patdu
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177 views2 pages

Physics of Threshold Angles

The experiment aimed to determine the threshold angle, which is the minimum angle at which tilted objects begin to slide due to gravitational force. The experiment measured the threshold angles of different objects - a block of wood, glass of water, and can of water - placed on a tilted cardboard surface. The block of wood had the highest average threshold angle of 35 degrees, while the glass and can of water had average threshold angles of 25 and 11.67 degrees respectively. The threshold angle depends on the frictional forces between surfaces in contact and the type of materials, with rougher or heavier materials requiring a greater tilt angle before sliding. Understanding threshold angles relates to Newton's laws of motion and gravity.

Uploaded by

Jovella Patdu
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Determination of the Threshold Angle

Danice Ira M. Camba


Far Eastern University Alabang – Senior High School Program
Alabang, Muntinlupa City 1781, Philippines

I. Introduction Commented [U1]: Make this short and simple. Explain


what threshold angle is and how important it is to
The "threshold" in threshold angle means the minimum purity value peak is pure. This value is usually based on a understand. Also, relate Newton’s Laws to the experiment.
statistical analysis of the noise in the spectra. If the measured value is larger than the threshold, then the peak is Lastly, clearly show the objectives of the experiment.
considered pure. Otherwise, the peak is considered impure. Threshold angle, the point in passive range of motion
where a muscle response or torque change is elicited, may be a potentially valid measure of hypertonus . It usually
appears when an object is tilted, and the gravitational force makes the object on top of the base slide. The activity’s
aim is to learn how to find the threshold angle of a tilted object.

II. Materials and Methods Commented [U2]: For this performance Task, include
pictures of the demonstration that you did at home. Just
The materials used in this activity are a cardboard, block of wood, glass of water, can of water and a protractor. follow the steps indicated in the book.
In order to measure the threshold angle, the cardboard must be tilted until the object slides. The cardboard serves as a
base for the soda can, glass, and the piece of wood.

III. Results

Threshold Angle

Trial Block of wood Glass of water Can of water


Mass = 0.26g Mass = 0.26g Mass = 0.26g

1 45 ° 35 ° 10 °
2 40 ° 30 ° 20 °
3 20 ° 10 ° 5°
Average 35 ° 25 ° 11.67 °
IV. Analysis Questions
1) Which among the materials have the highest threshold angle?
The block has the highest threshold because of its large height and it easily sled through the cardboard because
it has no water.

2) What is the relationship between the threshold angle and the frictional force experienced by the surfaces in
contact?
The threshold angle made the objects slide because of the gravitational pull, and there was frictional force
because the texture of the cardboard was rough. Frictional force usually happens when objects slide through
the ground.

3) What is the relationship between the type of materials in contact and their threshold angle?
The cardboard acts as a base to the materials and the materials in contact react to the gravity pull when the
cardboard was tilted. The threshold angle makes the materials slide because of the uneven base of the tilted
cardboard.

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