Energy, Work and Power
Flashcard
•
Physics
•
11th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for calculating work?
Back
Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.
2.
FLASHCARD QUESTION
Front
Define kinetic energy.
Back
Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.
3.
FLASHCARD QUESTION
Front
What is potential energy?
Back
Potential energy is the energy stored in an object due to its position or configuration, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.
4.
FLASHCARD QUESTION
Front
How does the speed of an object affect its kinetic energy?
Back
The kinetic energy of an object increases with the square of its speed; as speed doubles, kinetic energy increases by a factor of four.
5.
FLASHCARD QUESTION
Front
What is the unit of work in the International System of Units (SI)?
Back
The unit of work is the Joule (J).
6.
FLASHCARD QUESTION
Front
If a 2 N force moves an object 4 m, how much work is done?
Back
Work done = 2 N × 4 m = 8 J.
7.
FLASHCARD QUESTION
Front
What happens to potential energy as an object falls?
Back
As an object falls, its potential energy decreases while its kinetic energy increases, conserving total mechanical energy.
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