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An object falls through the air, gaining speed as it falls. A student claims that this creates new energy, and so it breaks the law of conservation of energy. Which statement describes why the student is incorrect?(1 point)
A. Energy can be created without breaking the law of conservation of energy.
B. Speed is not related to energy in any way.
C. Energy is converted from other forms, not created.
D. Equal and opposite amounts of other energy are also created.
A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the lowest?(1 point)
A . when the ball leaves the person’s hand
B. at a point before the ball hits the ground
C. when the ball is at its highest point
D. at a point when the ball is still rising
A book is at rest on a flat table. The book is pushed, causing it to move and eventually come to rest again. How does the potential energy change during this process?(1 point)
A. The potential energy increases at first and then comes back down to zero.
B. The potential energy decreases at the beginning when the kinetic energy increases.
C. The potential energy will stay the same as long as the book stays on the table.
D. The potential energy will stay the same unless the book speeds up or slows down.
What is a good description of potential energy? (1 point)
A. stored energy
B. energy of reaction
C. conserved energy
D. energy of motion
1. C
2. C
3. B
4. A
49 answers
1. Energy is converted from other forms, not created.
2. when the ball is at its highest point
3. The potential energy will stay the same as long as the book stays on the table.
4. Stored energy
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2. when the ball is at its highest point
3. The potential energy will stay the same as long as the book stays on the table. The kinetic energy increases as the book is pushed across the table.
4. inertia
5. A moving body will remain in perpetual motion until it is acted upon by a force. / A force is required to change the direction of motion of an object.
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~The Nerd
2.D
3.B
4.B
- Energy is converted from other forms, not created.
Q2: A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the lowest?
- when the ball is at its highest point
Q3: A book is at rest on a flat table. The book is pushed across the table, causing it to move and eventually come to rest again. How does the potential and kinetic energy change during this process?
- The potential energy will stay the same as long as the book stays on the table. The kinetic energy increases as the book is pushed across the table.
Q4: Which is a good description of potential energy?
- stored energy
as of 9.29.22, these are the correct answers.
1. Energy is converted from other forms, not created
2. When the ball is at its highest point
3. The potential energy will stay the same as long as the book stays on the table. The kinetic energy increases when the book shoved and then gradually decreases as it slides across the table and then comes to rest on the edge.
4. Stored energy
Trust me I just got 4/4 aka 100%
1 answer