speed, in m/s, given 400 m travelled in 253 seconds
- Thread starter trex
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D
Deleted member 4993
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trex said:
A lot of the time, units can help you figure out what the problem is asking for. I really started to realize this in AP Physics, where there are so many formulas to memorize and often it's easy to mix two together. Your question is asking for an answer with the units m/s, or meters/seconds, or meters per second, or meters divided by seconds. Knowing this, chances are you can get the answer by dividing your value with the units "m" by your value with the units "s" :
400 m / 253 s = (approximately) 1.58 m/s
http://tinyurl.com/5aerqe
Of, if you want to memorize the formula:
Average Speed = (the total distance traveled) / (the time it took to travel that distance)
Average Velocity is sort of the same thing, but it's the distance traveled from the starting point divided by the time it took to get there. So you could have an instance where your average speed and average velocity are the same, or an instance where your average speed is, say, 50m/s and your average velocity is 0m/s because you end in the same position you started. If the velocity suff confuses you, just concentrate on speed for now! Hope that helps!
400 m / 253 s = (approximately) 1.58 m/s
http://tinyurl.com/5aerqe
Of, if you want to memorize the formula:
Average Speed = (the total distance traveled) / (the time it took to travel that distance)
Average Velocity is sort of the same thing, but it's the distance traveled from the starting point divided by the time it took to get there. So you could have an instance where your average speed and average velocity are the same, or an instance where your average speed is, say, 50m/s and your average velocity is 0m/s because you end in the same position you started. If the velocity suff confuses you, just concentrate on speed for now! Hope that helps!
D
Deleted member 4993
Guest
trex said:
\(\displaystyle Speed\, = \, \frac{distance}{time}\)
distance = 400 m
time = 253 s
\(\displaystyle Speed\, = \, \frac{400}{253}\,\frac{m}{s}\)
\(\displaystyle Speed\, = \,1.581027668 \,\frac{m}{s}\, = \,1.58 \,\frac{m}{s}\)