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## High school physics

### Course: High school physics>Unit 1

Lesson 2: Distance, displacement, and coordinate systems

# Worked example: distance and displacement from position-time graphs

Worked examples finding displacement and distance from position-time graphs.

## Want to join the conversation?

• It's so confusing for me especially to calculate the distance. The one that I learn in school to calculate the distance is to multiply the speed by the time. But this one is so confusing I can't figure it out.
• Just add the absolute values of all the travelling. Suppose Tony Stark moved forwards 5m, move backwards 8m, and then moves forward 12m. Abs=absolute value
Distance:
Abs(5)+abs(-8)+abs( 12)
5+8+12
25
Tony Stark traveled a DISTANCE of 25m
• sorry i thought the distance traveled by the armadillo will be 30km
can you explain more?
• at rest the roll was 6m , so we are not taking 6 while calculating the distance. basically it STARTED FROM 6m, then travelled 9m n then travelled 15m south
the roll went from 6m to 15m so it travelled 9m and then from 15m it went down to 0 so it travelled 15 m. hence the answer = 9+15 = 24m

hope this helps!
• this is so confusing
• Isn't distance is the magnitude of displacement?
• Well actually, distance is only equal to the magnitude of displacement when the direction doesn't change, but like the guy says in the video at around , the negative sign on that 6 signifies a different direction than that positive 9. And due to the fact that the direction changed, the distance can't be equal to the magnitude of displacement.
• i need help its very confusing and I don't get it ;(
• What does it mean by horizontal position?
• That is your displacement along the "x" axis. For example, x=7 would typically be 7 meters to the right of zero or the starting position and x=-3 would be 3 meters to the left of zero or the starting position.
• Why put the weight of the animals? Isn't it redundant?
• Yes, it is unnecessary to the problem, but you probably have seen a word problem that provides extra information that is not necessary to solve the problem. This is really to just give information about the iguana.
(1 vote)
• Sorry if this is stupid but,
What was the difference between distance and displacement?