Speed of a ball thrown up coming down?

Question

KidzTalk Points Day Question #6

Points: 1,500

Topic: Science

Due Date: Today

First to correctly answer wins.

If you throw a ball up in the air at 100 ft/sec, estimate how fast it will be when it finally comes back to you?

Answer 1

 if an object goes up at a certain speed its starts to get slower cuz of gravity but when it hits 0ft/s it starts going down and by the time it reaches the point in altitude it was thrown it would be going the same speed

 

the ball is always decelerating when it is going up and accelerating when it goes down so therefore the ball will be going the same speed when it leaves your hand as when it comes back

 

So if you throw the ball at 100ft/s the ball will hit your hand at 100ft/s

(If you catch it)

Comments

It would actually come back a bit slower because of air resistance, but you are close enough.

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Oh ok cool thanks!

Answer 2

100 feet a second since the ball should come down with the same exact curve. If velocity is used, it could change the curve and go at a different speed

Comments

You got the correct approximate speed. However, even at a different velocity, the ball would come down at the same speed, but follow a different trajectory.

Answer 3

Gravity would slow the ball to just 10ft / second at the end

Answer 4

0.001 ft/sec. I don't know!