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Speed - Time VT Graphs

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Reading VT Speed - Time Graphs and calculating acceleration

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Insurance gives you speed time graphs and acceleration for those few do in OC art science GCSE this would be so pick P38 UA will BP 2 and XL will be jumping 15 we found fault on his way to Google's HQ to do some architectural reconfiguring and we made a distance-time graph of his Jenny and found that we can calculate an average speed by the fighting Distance by time go by calculating the gray image of the truck if you haven't watched it yet please click the link in the description so now I've Bob needs to Cheez-It before the fuzz a ride will document his Escape by drawing a speed time graph if asteroids off at a steady speed of 15 m the second for 10 seconds now to draw this on a speed time graph we draw a horizontal line at 52nd all the way to 10 seconds this is why people get confused also go into the distance time mode and Sophie so the person is not actually moving because as we all know on a distance time graph a horizontal line that means that it's actually not moving so be careful about that make sure you take off your distance time hot and put on your free time have 28 days okay so now the police are on Bob's tail pushing the no spots in in his tank helps him to accelerate to 20 meters per second in 5 seconds let's show this on the garage so we go from 15 minutes to seconds 220 meters a second in 5 seconds like this but oh no Calamity a little bunny has hopped onto the road in front of it being the caring type Slams on the brakes which brings into a halt in Tucson stopping just short of fun buns sadly football that allows that covers to have the drop on him and sorry night they just ain't no room for vigilantes in this world so what can we now do with this graph that well I'd like the distance time graphs we can calculate the gradients at different points but we on calculating speed this time but rather acceleration acceleration is equals to change in speed divided by time for changes overtime you take the final speed subtract the initial speed on / how long that took acceleration is measured in meters per second squared which makes sense seeing as though it's a change in speed meters per second divided start time again so that's meters per second per second and we can write that as meters per second squared right you'll send no post a video and calculate bulbs acceleration for the three parts of his journey let's see how you got some of course I was traveling at a steady speed his acceleration is 0 meters per second squared why because his change in speed is 0 he's not going any faster he's okay 97 his change in speed is 20 take away 15 so I gives is 5 m per second and that takes in five seconds so he's acceleration is 5 / 5 equals 1 meters per second squared what about the last bit then if you want to pull you would have noticed if we do final speed take away initial speed we get 0 take away 20 and I give this -20 meters per second if we divide that by 2 seconds we get mine 10 meters per second squared that's something to be aware of that a negative acceleration means that the person is decelerating or slowing down by the way in like two units you'll find that that's not always the case but for now it'll do but that's not all it turns out that calculation the area under the graph gives us the distance traveled spooky to do this you must split the area into rectangles and triangles the fear you have the better example I'd spits up this graph like this you multiply the signs of a right time to find its area on multiple are the signs of a triangle and then divide by 2 to find a safe area then at the mall. Okay Olio's pause the video here and calculi the distance he traveled let's see how you going with that so here are all the areas for my triangles and rectangles add them all up and we get this disc well done if you got that right so don't forget to like this video and leave a comment for what scientific can you like to see sketch next

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Speed - Time VT Graphs

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