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A. If paper as shown or B. if the paper is wadded up into a fairly tight ball. This is
because there is not enough air resistance to slow the paper down when it’s wadded
up.
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A.
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A. Yes it’s accelerating because her hand is pushing it up.
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A. It’s moving so it has a speed.
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A. Gravity is pulling it down so it has and acceleration of -9.8 m/s2
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B. The velocity is zero for an instant at the top of it’s flight. It was going up and it will
be going down so at this point it’s turning around and stopped briefly.
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A. Gravity is pulling it down so it has and acceleration of -9.8 m/s2 Even though the
velocity is 0, it has an acceleration. Acceleration is the change in velocity. If it did not
have an acceleration, it’s velocity would not change. It’s velocity is currently 0 so if
that did not change, it would float in mid air forever!!
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Yes it has a speed. It’s moving down.
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A. Gravity is pulling it down so it has and acceleration of -9.8 m/s2
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C. Speeds up the entire time because gravity is -9.8 m/s2 the entire time. One might
note that they’ve heard gravity depends on the distance from the body which is true
but we’d have to be hundreds of miles from the surface of the earth before there is
enough difference in gravity to notice.
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B. –g = -9.8 m/s2
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B. –g = -9.8 m/s2
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B. –g = -9.8 m/s2
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