Vector Resolution.

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Presentation transcript:

Vector Resolution

What do you do if you have 2 or more vectors? We use the term VECTOR RESOLUTION to suggest that any vector which IS NOT on an axis MUST be broken down into horizontal and vertical components. BUT --- the ultimate and recurring themes in physics is take any and all vectors and turn them all into ONE BIG RIGHT TRIANGLE.

TIPS Make a drawing showing all the vectors, angles, and given directions. Make a chart with all the horizontal components in one column and all the vertical components on the other. Make sure you assign a negative sign to any vector which is moving WEST or SOUTH. Add all the horizontal components to get ONE value for the horizontal. Do the same for the vertical. Use the Pythagorean Theorem to find the resultant and Tangent to find the direction.

Example A search and rescue operation produced the following search patterns in order: 1: 30 meters, west 2: 65 meters, 32 degrees East of South 3: 130 meters, east 4: 42 meters, 22 degrees West of North

2: 65 meters, 32 degrees East of South Tip #1: Make a drawing showing all the vectors, angles, and given directions. 1: 30 meters, west 2: 65 meters, 32 degrees East of South 3: 130 meters, east 4: 42 meters, 22 degrees West of North 30 m, W 32o 65 m 42 m 22o 130 m, E

2: 65 meters, 32 degrees East of South 3: 130 meters, east Tip #2 - Make a chart with all the horizontal components in one column and all the vertical components on the other. 1: 30 meters, west 2: 65 meters, 32 degrees East of South 3: 130 meters, east 4: 42 meters, 22 degrees West of North Leg Horizontal Vertical 1 30 m 0 m 2 3 130 m 4

65 meters, 32 degrees East of South Tip #2 - Make a chart with all the horizontal components in one column and all the vertical components on the other. 65 meters, 32 degrees East of South Leg Horizontal Vertical 1 30 m 0 m 2 3 130 m 4 34.44 m 55.12 m 65cos32 = 55.12 m 65 m 32 v.c h.c. 65sin32 =34.44 m

42 meters, 22 degrees West of North Tip #2 - Make a chart with all the horizontal components in one column and all the vertical components on the other. Leg Horizontal Vertical 1 30 m 0 m 2 34.44 m 55.12 m 3 130 m 4 42 meters, 22 degrees West of North 42sin22 =15.73 m h.c. 22 v.c 42 m 42cos22=38.94 m 15.73 m 38.94 m

Tip #3 : Assign a negative sign to any vector which is moving WEST or SOUTH. Leg Horizontal Vertical 1 30 m 0 m 2 34.44 m 55.12 m 3 130 m 4 15.73 m 38.94 m 1: 30 meters, west 2: 65 meters, 32 degrees East of South 3: 130 meters, east 4: 42 meters, 22 degrees West of North - - -

2: 65 meters, 32 degrees East of South 3: 130 meters, east Tip #4 : Add all the horizontal components to get ONE value for the horizontal. Do the same for the vertical. Leg Horizontal Vertical 1 -30 m 0 m 2 34.44 m -55.12 m 3 130 m 4 -15.73 m 38.94 m Total 118.71 m -16.18 m 1: 30 meters, west 2: 65 meters, 32 degrees East of South 3: 130 meters, east 4: 42 meters, 22 degrees West of North 118.71 m -16.18 m What does this mean???

Tip #5: Use the Pythagorean Theorem to find the resultant and Tangent to find the direction. 30 m, W q -16.18 m 32 65 m 42 m 22 130 m, E Final Answer: 119.81 m, 7.76 degrees, South of East