Log in Inkit8 6 years agoPosted 6 years ago. Direct link to Inkit8's post “What would the displaceme...” What would the displacement be when going around a circle? • (35 votes) Jonathan Matta 5 years agoPosted 5 years ago. Direct link to Jonathan Matta's post “Imagine or get two thumbt...” Imagine or get two thumbtacks. Stick thumbtack 1 in while making thumbtack 2 go in a circle starting from thumbtack 1. Stop thumbtack 2 wherever you want in the circle you're creating, and stick it in. Then tie a string from thumbtack 1 to thumbtack 2. THAT STRING IS YOUR DISPLACEMENT AND THE PATH YOU TRAVELED IS YOUR DISTANCE: (55 votes) Richard Neuhaus 6 years agoPosted 6 years ago. Direct link to Richard Neuhaus's post “I've worked in the aerosp...” I've worked in the aerospace industry for 40 years. In all that time I've never once come across negative velocity. If I told my colleagues about this concept, they've wouldn't believe it. • (26 votes) faristheknight77 a year agoPosted a year ago. Direct link to faristheknight77's post “My guy, if you are 40 yea...” My guy, if you are 40 years old and are an engineer, why are you on a khan academy page for high school physics 💀 Ruchira a year agoPosted a year ago. Direct link to Ruchira's post “My question is...when som...” My question is...when someone reached to his car and then go back to his home because he forgot something, the average speed cannot be 0 because he has walked at least few meters. So, how am I suppose to calculate the average velocity? • (2 votes) K.L.F a year agoPosted a year ago. Direct link to K.L.F's post “Well the average velocity...” Well the average velocity is displacement divided by time, so If Jonny walks to his truck from his house and realizes he forgot his wallet and then goes back to the house where he started over 68 seconds, his average velocity would be zero. The reason for that is because his displacement would be none, displacement is how far the object is from its original position, not the total distance traveled. Hope this helps! (18 votes) 147227 4 years agoPosted 4 years ago. Direct link to 147227's post “When it asks for a signif...” When it asks for a significant number, what would 0.0008 be? • (10 votes) Gandolf22 5 years agoPosted 5 years ago. Direct link to Gandolf22's post “I'm confused, because in ...” I'm confused, because in this article, it says average speed is written as Vavg (V with a lowercase "avg"), but in Sal's video, he writes average velocity as the same thing. Which should I follow? • (7 votes) Jardani Jovonovich 4 years agoPosted 4 years ago. Direct link to Jardani Jovonovich's post “vavg, start subscript, s...” vavg, start subscript, start text, a, v, g, end text, end subscript is average speed killq 7 months agoPosted 7 months ago. Direct link to killq's post “what does "your answer sh...” what does "your answer should be an exact decimal." because on my calculator for example the answer would be 0.37 and when i went to put it in the answer would be 0.38 and i was getting lots of questions wrong because of this. am i doing something wrong or is it me being dumb? • (4 votes) Fayos08 7 months agoPosted 7 months ago. Direct link to Fayos08's post “The question says to roun...” The question says to round off your answers to two significant figures. (3 votes) Curfew, Victoria 3 7 months agoPosted 7 months ago. Direct link to Curfew, Victoria 3's post “I get the math I mess up ...” I get the math I mess up the displacement and the velocity sometimes. • (4 votes) Lucas 7 months agoPosted 7 months ago. Direct link to Lucas's post “Displacement is the theor...” Displacement is the theoretical amount traveled. Velocity is the rate in which the object changes its position. First find the displacement, then divide it by the time to get your velocity. (2 votes) ISHAAN KEDAR 4 years agoPosted 4 years ago. Direct link to ISHAAN KEDAR's post “if they ask us to round o...” if they ask us to round of to 2 significant values do we round of the greater or lower digit for ex 3.344 should be rounded off to 3.35 or 3.34 • (2 votes) jpilarski 4 years agoPosted 4 years ago. Direct link to jpilarski's post “Rounding 3.344 to two sig...” Rounding 3.344 to two significant digits would be 3.3. (in your example, rounding to 3.34 would be rounding to two decimal places) (6 votes) natbetanco711 6 years agoPosted 6 years ago. Direct link to natbetanco711's post “How would you calculate t...” How would you calculate the displacement if for example, an object moved north (vertical) and then east (horizontal)? Im struggling to find the Avg. Velocity for this question: "A truck traveled 400 meters north in 80 seconds, and then it traveled 300 meters east in 70 seconds. The magnitude of the average velocity of the truck was most nearly (answer)." My professor said the answer was 6.6 m/s. But how? • (3 votes) ssourish2020 5 years agoPosted 5 years ago. Direct link to ssourish2020's post “By the way I found the an...” By the way I found the answer was 3.3m/s, where you don't divide 150 seconds by 2. (3 votes) Zainab 4 years agoPosted 4 years ago. Direct link to Zainab's post “How is average velocity a...” How is average velocity a vector? Is it because it is direction-aware? • (2 votes) Mahimaa Ramakrishnan 3 years agoPosted 3 years ago. Direct link to Mahimaa Ramakrishnan's post “since average velocity de...” since average velocity depends on displacement which is a vector ( both magnitude and direction are considered) average velocity os a vector, and yes 'cause it's direction-aware. (2 votes)Want to join the conversation?
Visit link for example:
https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwiN0-HA3drgAhU6JTQIHdnXDhEQjRx6BAgBEAU&url=https%3A%2F%2Fwww.quora.com%2FA-body-is-moving-along-a-circular-path-of-radius-r-What-will-be-the-distance-and-displacement-of-the-body-when-it-completes-half-a-revolution&psig=AOvVaw2ahScm9ik2ti3H8hx2vSLS&ust=1551316231398291
Did you get 0.37 exactly? I don't think so. If you got other digits after 0.37, then the reason why the correct answer is 0.38 is because the digit after 7 in 0.37 is a digit that can be rounded up so 1 will be added to 7 to make the answer 0.38 instead of 0.37
In mathematics, when writing numbers in two significant figures, you must not forget to round up or down.
You should probably brush up on rounding numbers up or down for better understanding.
Hope this helps:)
http://msgrantsphysics.weebly.com/uploads/2/1/3/3/21339258/ap_physics-1d_linear_motion_exam_review.pdf
FAQs
Average velocity and speed review (article) | Khan Academy? ›
People may think that average speed and average velocity are just different names for the same quantity, but average speed depends on distance and average velocity depends on displacement. If an object changes direction in its journey, then the average speed will be greater than the magnitude of the average velocity.
How to find average velocity and speed? ›Average speed = Distance / time elapsed = 180 meters / 6 seconds = 30 meters/second. Average velocity = Displacement / time elapsed = 60 meters / 6 seconds = 10 meters/second. 2.
What is the difference between speed and velocity? ›To summarize, speed and velocity are similar but different. Speed is a measure of distance traveled over time, where distance refers to how much ground is covered by an object in motion. Velocity is a measure of displacement over time, and displacement refers to the net change in position of an object in motion.
How to find average velocity on a velocity-time graph? ›To find the average velocity of an object over a given time interval, you need to calculate the displacement travelled during that interval, then divide it by the time taken. To calculate the average velocity on a velocity vs time graph, the displacement must first be calculated from the area under the graph.
How to calculate velocity? ›The most basic formula for calculating velocity is velocity (v) = distance (d)/time (t). If you don't already know the time and distance, you'll need to calculate them first. Subtract the initial position from the final position to find distance, and subtract the start time from the end time to find the time.
What's the difference between average speed and average velocity? ›Average speed is calculated as the distance traveled over the total time of travel. In contrast, average velocity is defined as the change in position (or displacement) over the total time of travel.
What are 5 differences between speed and velocity? ›Velocity is direction-aware and it is the rate of change of position of an object. Speed is a scalar quantity, i.e., it has only magnitude. Velocity is a vector quantity, i.e., it has both magnitude and direction. Speed measures the distance traveled (d) over the change in time (Δt).
Can you have speed without velocity? ›For example, if you're running on a track, your speed is how fast you are running, while your velocity is how fast you are running in a certain direction. Imagine running around a track in a circle. You could be running really fast, but your velocity would be zero because you're not going in any particular direction.
Why do we use velocity instead of speed? ›Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.
Is velocity positive or negative? ›If the object is moving in the positive direction, the velocity is positive. If the object is moving in the negative direction, the velocity is negative.
What is the rule for average velocity? ›
Average velocity is calculated by dividing your displacement (a vector pointing from your initial position to your final position) by the total time; average speed is calculated by dividing the total distance you traveled by the total time.
Can an acceleration be negative? ›Negative acceleration: An object has a negative acceleration if an object is moving in a positive direction and slowing down, or moving in a negative direction and speeding up.
What are the 4 formulas for velocity? ›| Variable | Equation |
|---|---|
| Velocity | v=u+at |
| Displacement with positive acceleration | s=ut+21at2 |
| Displacement knowing initial and final velocities | s=21(u+v)t |
| Velocity squared | v2=u2+2as |
- v = u + at.
- v² = u² + 2as.
- s = ut + ½at²
It is calculated by dividing the total distance something travels by the total amount of time it spends traveling. For example, one can consider the car from earlier. If the car travels 70 miles in 2 hours, it would have an average speed of 70 / 2 = 35 miles per hour.
How to find average speed when time is not given? ›Just add the initial speed to the final speed and divide the sum by two. The result is average speed.
What is the formula for average flow velocity? ›In order to determine the Flow Rate represented as Q, we must define both the volume V and the point in time it is flowing past represented by t, or Q = V/t. Additionally Flow rate and velocity are related by the equation Q = Av where A is the cross-sectional area of flow and v is its average velocity.
How do you find the average velocity during each time period? ›To find the average speed we take the total distance traveled divided by the time interval. To find the average velocity we take the displacement divided by the time interval.