#1
Hey guys, I got my science exam tomorrow, and I've been studying physics.

Now, I got most of it down, but this displacement stuff kinda puzzles me

If anyone could answer this question, it would be greatly appreciated.

A team of runners ran 3.2 km north in 12 minutes, than turned around and ran 3.8 km south in 15 minutes. Determine the displacement of the team.

I know the answer is -0.6 or 0.6 km South, but I don't know how to achieve it..

Any help is appreciated thanks
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#3
something - something = 0.6

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Last edited by ThinLizzyFan at Jan 22, 2009,
#6
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Hey guys, I got my science exam tomorrow, and I've been studying physics.

Now, I got most of it down, but this displacement stuff kinda puzzles me

If anyone could answer this question, it would be greatly appreciated.

A team of runners ran 3.2 km north in 12 minutes, than turned around and ran 3.8 km south in 15 minutes. Determine the displacement of the team.

I know the answer is -0.6 or 0.6 km South, but I don't know how to achieve it..

Any help is appreciated thanks

Displacement is just distance from starting point.

So if they go 3.2 km north, then run 3.8km south, then they are 0.6km south of where they started from (since 3.8-3.2=0.6).

It's really very easy.
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#7
From what you've put I'm guessing that by 'displacement' they mean how far from their starting point did they end up. So if the went 3.2km North, and then went 3.8km south, they went .6km further south than north - so they ended off 0.6 km south of their starting position. Might be worth drawing it on a bit of paper so it makes sense
#8
They start at position 0.

They then go north 3.2 Km (the time is irrelevant, don't know why it's there), so their position is now 3.2Km north of the starting point (point 0).

Now they go 3.8Km south, which is the opposite direction.

3.2Km north - 3.8Km south (assuming north is the positive direction), gives you -0.6 km north, or 0.6km south.

Voila.
#12
Just think of displacement as distance from a starting point with a direction.

So in this the overall distance is 0.6km North as that is where they are in regards to their starting point.
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