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# Aperson on hot air balloon dropped their phone . the balloon is 35m and rises 7m/s. a)how long does it take to move upwardsb)what is thr max height ? c)how long it takes to land ?

• Réponse publiée par: elaineeee

how long does it take to move upwards

• Réponse publiée par: elishakim80

Any point along the circular line at the center of the ring of the doughnut shaped mass will still undergo gravitational pressure from the fact that it is not centered on the total mass of the ring.

https://www.quora.com/Where-is-the-center-of-gravity-of-a-dense-and-massive-doughnut-located-And-what-shape-would-it-have-Would-it-be-a-point-at-the-center-of-its-empty-hole-or-a-gravity-line-in-the-center-of-the-doughnuts-ring. answerd byJeffery Werbock - musician and lecturer

• Réponse publiée par: cleik

Law of intertia

Explanation:

The question has an apsistance but instead of this i have an idea.

Equivalent force sould be equal to frictional force. Additionally we know that the frictional force direction is opposite direction of velocity. As a result we can easily see that if the bowling ball is on move, it will want going on. If it not, won't.

Have a good works..

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Aperson on hot air balloon dropped their phone . the balloon is 35m and rises 7m/s. a)how long does...