cq_1_211

#$&*

Phy 201

Your 'cq_1_21.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

cq_1_211

#$&*

Phy 201

Your 'cq_1_21.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

** **

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 moves faster because gravity is pushing in the same direction as the ball.&&&&&&&

Gravity doesn't move, it exerts a force which tends to accelerate, or change the velocity of, an object.

Earth's gravity, near the surface of the Earth, acts in the direction we perceive as downward.

If there was no air resistance, what would be the answer to this question?

If the object is moving upward, does gravity act in the direction of motion or opposite the direction of motion?

If the object is moving upward, is the force of air resistance upward or downward?

If the object is moving upward, does the force of air resistance therefore enhance or diminish the effect of the gravitational force?

How therefore does the motion of the object differ from what it would be if no air resistance was present?

If the object is moving downward, does gravity act in the direction of motion or opposite the direction of motion?

If the object is moving downward, is the force of air resistance upward or downward?

If the object is moving downward, does the force of air resistance therefore enhance or diminish the effect of the gravitational force?

How therefore does the motion of the downward-moving object differ from what it would be if no air resistance was present?

What is the net effect on the velocity of the object?

#$&*

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

answer/question/discussion: ->->->->->->->->->->->-> : ->->->->->->->->->->->-> :

Air resistances will slow it down because it pushes against gravity.

#$&*

** **

You appear to have some misconceptions here.

Please revise in accordance with the questions I've posed.

&#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.

REVISION

&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new solutions with the expanded discussion at the link
Solution

Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.
If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#