Physics, 11.06.2020 05:57 kingkuka1700
You throw a baseball straight up. Analyzing the system consisting of just the baseball, compare the sign of the work done by Earth on the ball while the ball goes up with the sign of the work done by Earth while the ball goes down.
a. The work is positive on the way up and positive on the way down.
b. The work is positive on the way up and negative on the way down.
c. The work is negative on the way up and positive on the way down.
d. The work is negative on the way up and on the way down because the gravitational force is always downward.
e. The work is zero in both portions of the motion.
Answers: 2
Physics, 22.06.2019 21:30
Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.
Answers: 1
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