You throw a rock straight up into the air. Ignoring air resistance, is the magnitude of the rock's acceleration greater than
g
, equal to
g
, less than
g
or zero at each of the following moments? At each moment, what is the sign of the acceleration (positive or negative?) Answer both questions for each part below (a) ( 2 points) Immediately after being released from your hand. Magnitude:
a=ga>gaa=ga>g??a=g?a>9aa=g?a>g?a=ga>g??a a=g a>g
Sign: a pasitive ? a is zero ? a negativea a=g ? a>g
Sign: a positive a is zero ? a negative
(e) (2 points) Immediately before returning to your hand.
Magnitude: a a=g a>g
Sign: a pasitive ? a is zero ? a negativea ? a=g ? a>9
Sign: a positive a is zero a negative
(d) (2 points) Half way between the highest point and the point where you released it (on the way down).
Magnitude: a a=g ? a>g
Sign: a positive a is zero ? a negative
(e) (2 points) Immediately before returning to your hand.
Magnitude: a a=g a>g
Sign: a pasitive ? a is zero ? a negativea a=g a>g
Sign: a positive a is zero ? a negative
(c) (2 points) Half way between the highest point and the point where you released it (on the way up).
Magnitude: a ? a=g ? a>9
Sign: a positive a is zero a negative
(d) (2 points) Half way between the highest point and the point where you released it (on the way down).
Magnitude: a a=g ? a>g
Sign: a positive a is zero ? a negative
(e) (2 points) Immediately before returning to your hand.
Magnitude: a a=g a>g
Sign: a pasitive ? a is zero ? a negativea a=g a>g
Sign: a positive a is zero a negative
(b) ( 2 points) At the highest point of the motion.
Magnitude: a a=g a>g
Sign: a positive a is zero ? a negative
(c) (2 points) Half way between the highest point and the point where you released it (on the way up).
Magnitude: a ? a=g ? a>9
Sign: a positive a is zero a negative
(d) (2 points) Half way between the highest point and the point where you released it (on the way down).
Magnitude: a a=g ? a>g
Sign: a positive a is zero ? a negative
(e) (2 points) Immediately before returning to your hand.
Magnitude: a a=g a>g
Sign: a pasitive ? a is zero ? a negative