Francesco a pizza chef preparing the dough for your pizza is...

Francesco, a pizza chef preparing the dough for your pizza is throwing it to expand it. In this process, you notice that a chunk of it comes off, flying separately from the rest on to the floor. If Francesco is 5 feet and 2 inches tall, and the chuck flies off vertically straight up from his height at a speed 1 m/s, with what speed does the chunk hit the ground?

Transcript

00:01 Hi, so in this question we have francesco is spinning a pizza and is throwing a little brother and then a chunk of it flies practically upwards at one meter per second.

00:14 So then chavolost is called a u a meter per second and francesco is six feet three inches tall.

00:24 So all want to do is find so this is the point where francesco throws throws the pizza through to and this is a point where the junk flies of and it's a six point right of six feet three inches above the ground so what want to do is find the velocity that the chunk hits the ground we'll find velocity at this point all right so first of all we're going to find the maximum height rich by the chunk so we know that the final velocity at maximum height would be zero meters per second so using the initial velocity of 1, and the acceleration, which is the acceleration due to gravity, 9 .81, we'll calculate the height.

01:23 So using s is equal to, rather, v squared is equal to u squared plus 2, g.

01:34 And let's call this h for the height.

01:37 So, v is 0, u1 squared plus 2, and g in this case would be negative because the chunk is going up as it goes up, it decelerates, because it's especially to gravity is directed downwards.

01:55 So this is minus 9 .81, the height.

01:59 So h is equal to approximately 0 .0 .05, 0 ,06 meters.

02:07 And this heat you just calculated is from this point.

02:14 So from here, we need to add it to this height of 6 feet 3 inches, and then we find the velocity comes to hit the groundward...

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