5

Question 1Calculate the average speed and average velocity of the following trip_5m3mi3m5m...

Question

Question 1Calculate the average speed and average velocity of the following trip_5m3mi3m5m

Question 1 Calculate the average speed and average velocity of the following trip_ 5m 3mi 3m 5m



Answers

(1I) Calculate the average speed and average velocity of a
complete round trip in which the outgoing 250 $\mathrm{km}$ is
covered at 95 $\mathrm{km} / \mathrm{h}$ , followed by a 1.0 -h lunch break, and
the return 250 $\mathrm{km}$ is covered at 55 $\mathrm{km} / \mathrm{h}$ .

Yeah, in this problem of motion, we have to find the average speed of an auto that travels 108,550 50 m. So auto travels 8550 m in six minutes, 35 seconds In 6:35. Now we have to find the average speed in meter per second. So the average in meter per second. So average speed is defenders distance travel. So this is a distance travel divided with the time taken. So this is time taken. The distance traveled 8550 m. So this is 8550 m. And we want average experience meter per second. So we have to convert this six minutes, 35 seconds into meter one minute is equal to 60 seconds and this will be 360 seconds plus 35 seconds equals two 395 seconds. So this is divided with 395 seconds. Now we average is equals two 8000 mhm. This is 8550 divided, with 395 is equal to 21.6, so this is 21.6 m/s, so this is the average speed.

So we're told that this car has gone .75 km in 20 seconds on the trip, there's no .75 km mhm in 20 seconds. And we want to figure out what the average velocity is of the of this trip, And we want it in m per second. So the first thing we have to do is we have to convert this .75 km into meters. So we just multiply by 1000 to get two m since one km 1000 m. So he could say that he went 750 m in 20 seconds. And so the average velocity of this trip is just going to be the total distance traveled, which is the 750 m Divided by the total amount of time it took, which was 20 seconds. So it's going to be 750 divided by 20 and it's gonna be in meters per second. So if we plug this into a calculator, 750 divided by 20 is equal to 37.5. So the average velocity was 37.5 m/s on the trip there. Mhm. The second thing we want to do is find the average velocity of the total trip. So we're told that on the way back, this car went the same route, so another .75 km or 750 m, But this time it took 25 seconds. So again, we just want to take the total distance traveled and divided by the total amount of time it took. So that's just gonna be 750 plus 750. um since there are 750 m going there 750 m going back And then we divide by 20 Plus 25 seconds since it took 20 seconds to get there In 25 seconds to get. So this is equal to 1500, divided by 45, and again it's in meters per second. And if we plug this into a calculator, 1500, divided by 45 is equal to 33.3 three, repeating, and again it's in meters per second, so this is our average velocity of the total trip going there and back.

Good day. This question we will be differentiating the average speed and average velocity. So after each speed is the distance, birth time, racial and speed is a scale. Are quantity since it is it is not evolve. It does not involve direction and average velocity. Yes, the there it is direction aware which is the the change in displacement. Birthday time, racial and velocity is a vector quantity since it involved it involved a position. Change our direction. Thank you.

A round trip Wass made, um and channel of distance or two hundred fifteen kilometer. With this speed off, ninety five people meter her Our So this is the initial starting point. This is the file on six one and then followed by a one hour break lunch break. And then he came back the same position in search with to the single since travel with the speed now is fifty five. He loved me too. Her power. So it was called this one Me going on this one. The speed off coming four mine were asked to find the average the average speed Also us to find the average you lost. Now what is the average speed? Speed is the distance traveled over the total So the average speed is equal to the distance traveled thoughts off the seance tripled over time. Took to travel that distance. So the total distance troubles in the going student fifty kilometre in the coming another two hundred fifty. So together the distance traveled This five hundred So Toto distance equal to five hundred kilometer. Now what is the target took to travel the two fifty kilometer and then added up to one hour lunch break. And then what is the time it just to come back? Remember, they're two speeds are different to the time of two is very different. So we know that V is distance over time. This means a contract time is equal. Tio distance over speech. All right. No, this calculates the tea going going to be equal to distance. Going right over the the gun on the distance was one to fifty seven kilometer divide by home to speak ninety five, right? Ninety five He loved meter herself Kyung Lim, cancel On this time this body's gonna be too horn Six, three, two Ours similar copulation We're going to take for to a time when he comes back. He traveled the same distance to fifty kilometer. But this time he wass of driving to the car with fifty five kilometer for a second. So expect the dialect is going to be longer but I'm working on it. I can still Oh, this this time is four point five for five hours. So the total time it called to you Thio Going lusty, coming. And don't forget t lunch. All right. Together you add them all together even end up with eight Jowers, front one seven seven a portion of an hour. So back to our calculating speed. So the average speed is the total distance traveled over the time. Uh, this distance is five hundred. He loved nature right on. What did you calculate the time to be? Eight point one one. But one, seven seven powers. So here did mark by eight point one seven seven. Oh, when we do the stuff, I end up where sixty warn Whoring tio One for seven key long eater her power. Let's remember the question. Give us the distance. Two hundred fifty six kilometers starts to significant figures on DH. The speed to give us with ninety five kilometers per hour and fifty five kilometres per hour. So this means also to significant figures. Our answer should not exceed The significant significant figures were giving the questions. So really, we want only to significant figure. So only sixty one to your meter. So sixty one he loved her. Her power is this Pete I now he once we average velocity, not velocity is different than spirit. Looking velocity is a vector on. You need to have a direction. Andi lost is defined to be the This place isn't travel This placement over time it took to make that clear. So we went to a fifty kilometer. We come back to fifty kilometer So Hama dispersement we make zero look her So our displacement zero That's the velocity is cedar, aren't you? Because with the units kilometers per hour.


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