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8:17 SearchAll iCloudDoneA balloonist ascending downward with velocity of 14 mls. An object was dropped from the height of 198.2 m. How long it takes to reach the g...

Question

8:17 SearchAll iCloudDoneA balloonist ascending downward with velocity of 14 mls. An object was dropped from the height of 198.2 m. How long it takes to reach the ground

8:17 Search All iCloud Done A balloonist ascending downward with velocity of 14 mls. An object was dropped from the height of 198.2 m. How long it takes to reach the ground



Answers

An object is thrown upward with a speed of $28.0 \mathrm{~m} / \mathrm{s}$. How long does it take it to reach its maximum height?

We have fallen number 84 in which we need to use falling object model, which is ethical toe a minus 16 t squared plus s whereas that should be in feet. So when the object fell on the ground at equal to zero on a sequel to In this case, we haven't provided to 56 ft. So according to falling object murder, do you will be equal to deal with equal to simply as by 16 on the road which is plus minus. So this is plus minus essays 256 by 16. This is 16 so devolve equal to plus minus 16 under route. So blessed, minus four. But time cannot be negative. So he will be four second. Thank you so much.

We have 83 number problem in which we need to use falling object model to find the time. So funding object model is ethical to mine and 16 t a square. Pless s falling object model is active equal to minus 16 t s squared, plus as where acid and feet did in second. Okay, so in this a question, a question. We have been given as equal to 144 ft. So 144 equal to minus 16 T Esquire. Okay. Dropped from the height of how long? It doesn't because the ground is there. No. Okay. At the ground at ground actual becoming below zero. So zero will be equal to minus 16 T Esquire plus 144. Now, let us add both sides. 16 2 years, Squire. This will be a six India squared minus 16 T squared plus 144 place 16 ts square. So we have a 16 ts quite equal to 144 that the divide both sides by 16. 16. This is nine. So we will be having equal toe plus minors under nine. So to your vehicle, tow plus minus three. But negative time cannot be negative. Three seconds. Thank you.

Uh So in this problem, um I'm under the assumption that you have established that the acceleration, the problem With gravity is negative 9.8 m/s squared because when they talk about the initial velocity being 19.6 meters per second With an initial height of zero uh then the equation that we're looking at is that negative 9.8? I'm going to call it X instead of t squared Plus 19.6 X is the equation that we're looking for a lot of people um maybe right as sfx, you know, for the height. So if you look at the question, how high is the ball thrown? Um What I would probably do is just factor out an X in the problem. So negative 9.8 x plus 19.6. Uh And what that will tell me is the time it will take for the ball to return to the ground. Because this one is X equals zero. Uh I guess I should point out that if effects he goes zero. Whether if if this is zero then the height of the ground. zero. So that negative 9.8 x plus 19.6 Equals zero would be when it returns. So what I would do Is subtract that 19.6 to the right side and then divide by that negative 9.8. So the time that it takes to return use a calculator because I don't know what that is in my head, 19.62 by about 9.8 Gives Me two seconds. So let's think about that for a second. That's actually your answer. Part B is a ball goes up back down from zero seconds to two seconds. Well at one second it's going to reach its maximum height. So what I would have to do is go back to the original problem and plug in one and from both of these, And they have 9.8 times one plus 19.6 times one would give me a maximum height 9.8 plus 19.6 gives me a maximum height for part A of 9.8 m, um and that was from plugging one in to this.

So if I started dropping, see that From 1.2 m above the moon's surface, then what almost time it will take policing the ones that actually interviewing that at 1.62, 1.62 m/s as well. Right, so we know that how much a person in general direction and and decide to move this one. So we know that a former that difficulty a sequel to YouTube plus half of it is but and since it is dropping, that means because in itself in the city you equals to forget. So in this case and s critical to 1.2 m, which we have decided to travel one by two. And despite individuals, half of that is given 1.62 Rukia Square. So it will be uh, 2.4 upon 1.62 volunteers. But So it will be I think about 24.1 16.2 To help upon 812 4.113. No, somewhere around somewhere around 6 36. Two tier square will be 614.1. So he comes out to be over here. That will come from 1.31 seconds. Okay, so this is the time this will take okay, thank you.


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