Boat Positioning: Lorraine and Jeff's Displacement in Race - Homework Question

In summary, Lorraine steered her boat out of the harbor, heading east. She traveled 500 m to one buoy and then turned north and headed 300 m to another buoy. Jeff also left the harbor from the same point, and traveled 300 m [N] to a buoy, and then went 500 m [E].After they finish moving, Lorraine and Jeff are in the same position. Jeff's boat is west relative to Lorraine's boat.
  • #1
Rasofia
12
0

Homework Statement



Lorraine steered her boat out of the harbor, heading east. She traveled 500 m to one buoy and then turned north and headed 300 m to another buoy. Jeff also left the harbor from the same point, and traveled 300 m [N] to a buoy, and then went 500 m [E].
a) What is the position of Jeff's boat relative to Lorraine's boat after they finish moving?
b) If Lorraine and Jeff race straight back, in what direction are they headed?[/B]

Homework Equations

The Attempt at a Solution


Okay, for letter a, I was a bit confused because are they not in the same position? They end up in the same place. But I guess technically Jeff's position would be west relative to Lorraine's boat?
For letter b, I said southwest, because they first go north east. Correct or not?

Thanks for your help :)[/B]
 
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  • #2
Rasofia said:
technically Jeff's position would be west relative to Lorraine's boat?
Unless he rammed her and one or both boats sank.
SW is good. There is a possibility that they want a compass heading in degrees. Remember enough trig to calculate that?
 
  • #3
Bystander said:
Unless he rammed her and one or both boats sank.
SW is good. There is a possibility that they want a compass heading in degrees. Remember enough trig to calculate that?

I used tangent inverse (y/x) and got around 31 degrees so maybe that's it?
I don't really know if that would be the right equation for this though.
 
  • #4
Rasofia said:
be the right equation for this though.
That's perfectly good. Compass headings for mariners start with 0 degrees at due north, proceed clockwise through 90 (E), 180 (S), 270 (W), and back to 360 (a full circle) reset to 0 (N). So you've got 270 - 31 rather than 225 which would be a nitpicker's SW. Hand them the number and SW or WSW and you are in business.
 
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1. What is displacement?

Displacement is a physical quantity that measures the distance and direction of an object's change in position from its initial position.

2. How is displacement different from distance?

Distance is a scalar quantity that measures the total length traveled by an object, while displacement is a vector quantity that takes into account an object's change in position from its starting point.

3. How is displacement calculated?

Displacement can be calculated by subtracting the initial position from the final position of an object. This can be represented by the equation 𝛥x = xf - xi, where 𝛥x is displacement, xf is the final position, and xi is the initial position.

4. What is a negative displacement?

A negative displacement indicates that an object has moved in the opposite direction of its initial position. This could be due to the object changing direction or returning back to its starting point.

5. Can displacement be zero?

Yes, displacement can be zero if the object ends up at the same position as its initial position. This means that the object has not changed its position or has moved in a complete circle and returned to its starting point.

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