physicsvector

# Wants To Vectors

Created 3 years ago

Duration 0:04:35
42
Slide Content
Tags: physics vector
1. ### Slide 1 - “Wants To…” Vector Solutions

• Using the Parallelogram Method
2. ### Slide 2 - “Wants to…” Problem

• Tom can swim 15 m/s in still water. He wants to swim straight East across a river that is flowing South at 11 m/s. What direction should he swim?
3. ### Slide 3 - “Wants to…” Problem

• You are given one component and the resultant.
• You need to find the other component.
• Build the parallelogram.
• You have a side and the diagonal.
• Solve for the other side using the Pythagorean theorem.
• Find the direction using sin, cos, or tan.
4. ### Slide 4 - Tom can swim 15 m/s in still water. He wants to swim straight East across a river that is flowing South at 11 m/s. What direction should he swim?

• 11 m/s
• 15 m/s
• sin = opp/hyp
•  = sin-1[(11m/s)/(15m/s)]
•  = 47.2o
• Answer: 47.2o N of E
• -or-
• 42.8o
• 11 m/s
5. ### Slide 5 - 11 m/s

• 15 m/s
• c2 = a2 + b2
• a2 = c2 - b2
• a = (15m/s)2-(11m/s)2
• a = 10.2m/s
• t = d/v
• t = (125m)/(10.2m/s)
• t = 12.3s
• 11 m/s
• Tom can swim 15 m/s in still water. He wants to swim straight East across a river that is flowing South at 11 m/s. What direction should he swim?How long will it take him to swim across the 125m wide river?