Grade 12 Physics: Motion and Energy
This worksheet covers fundamental concepts of motion and energy, including kinematics, dynamics, work, and conservation laws, suitable for Grade 12 physics students.
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Grade 12 Physics: Motion and Energy
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. Which of the following statements is true regarding potential energy?
It is directly proportional to an object's velocity.
It is stored energy due to position or state.
It is always converted into kinetic energy.
It is independent of external forces.
2. What is the SI unit for power?
Joule (J)
Newton (N)
Watt (W)
Meter per second (m/s)
3. The Law of Conservation of Energy states that energy cannot be created or , but only transferred from one form to another.
4. is the rate at which work is done or energy is transferred.
5. A car moving at a constant velocity has zero acceleration.
True
False
6. Work is done only when there is a displacement in the direction of the applied force.
True
False
7. A student pushes a 20 kg box across a floor with a force of 50 N over a distance of 10 meters. Calculate the work done by the student.
8. Explain the difference between speed and velocity.
9. Observe the energy pyramid diagram below. In a typical ecosystem, what does each level of the pyramid represent in terms of energy flow?
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