Seed 211

#$&*

course Phy 121

A ball is tossed vertically upward and caught at the position from which it was released. Ignoring air resistance will the ball at the instant it reaches its original position be traveling faster, slower, or at the same speed as it was when released?

answer/question/discussion:

It will be traveling slower than when it was released, because when it was released, the ball will have to be traveling fast enough to compensate for the force that gravity is applying.

@&
Gravity applies the same force to the ball on the way up as on the way down. On the way up it slows the ball, on the way down it speeds it up.

Will gravity slow the rising ball more than it speeds up the falling ball?
*@

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What, if anything, is different in your answer if air resistance is present? Give your best explanation.

answer/question/discussion:

Air resistance would be irrelevant, since it would be resisting the direction of motion both on the way up and the way down.

@&
Consider:

On the way up air resistance would increase the rate at which the ball slows while on the way down it would decrease the rate at which it speeds up.

Would this or would it not result in zero net effect?
*@

#$&*

" "A ball is tossed vertically upward and caught at the position from which it was released.

Ignoring air resistance will the ball at the instant it reaches its original position be traveling faster, slower, or at the same speed as it was when released?

answer/question/discussion:

It will be traveling slower than when it was released, because when it was released, the ball will have to be traveling fast enough to compensate for the force that gravity is applying.

#$&*

What, if anything, is different in your answer if air resistance is present? Give your best explanation.

answer/question/discussion:

Air resistance would be irrelevant, since it would be resisting the direction of motion both on the way up and the way down.

#$&*

@&
Check my notes and give these questions a little more thought, then please share your thinking.

&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes.

Seed 211

@& Gravity applies the same force to the ball on the way up as on the way down. On the way up it slows the ball, on the way down it speeds it up. Will gravity slow the rising ball more than it speeds up the falling ball? *@

@& Consider: On the way up air resistance would increase the rate at which the ball slows while on the way down it would decrease the rate at which it speeds up. Would this or would it not result in zero net effect? *@

@& Check my notes and give these questions a little more thought, then please share your thinking.

&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).Be sure to include the entire document, including my notes.

@&
Gravity applies the same force to the ball on the way up as on the way down. On the way up it slows the ball, on the way down it speeds it up.

Will gravity slow the rising ball more than it speeds up the falling ball?
*@

@&
Consider:

On the way up air resistance would increase the rate at which the ball slows while on the way down it would decrease the rate at which it speeds up.

Would this or would it not result in zero net effect?
*@

@&
Check my notes and give these questions a little more thought, then please share your thinking.

&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes.