Work-Energy Theorem

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•
Physics
•
11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the Work-Energy Theorem?
Back
The Work-Energy Theorem states that the net work done by the forces acting on an object is equal to the change in its kinetic energy.
2.
FLASHCARD QUESTION
Front
How is work calculated?
Back
Work (W) is calculated using the formula W = F × d × cos(θ), where F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.
3.
FLASHCARD QUESTION
Front
What is kinetic energy?
Back
Kinetic energy (KE) is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.
4.
FLASHCARD QUESTION
Front
If the velocity of an object doubles, how does its kinetic energy change?
Back
If the velocity doubles, the kinetic energy increases by a factor of four (2² = 4) because KE is proportional to the square of the velocity.
5.
FLASHCARD QUESTION
Front
What is the relationship between work and kinetic energy?
Back
The relationship is defined by the Work-Energy Theorem, which states that the work done on an object results in a change in its kinetic energy.
6.
FLASHCARD QUESTION
Front
What is the formula for calculating work done when a force is applied at an angle?
Back
The formula is W = F × d × cos(θ), where θ is the angle between the force and the direction of motion.
7.
FLASHCARD QUESTION
Front
How do you calculate the change in kinetic energy (ΔKE)?
Back
ΔKE is calculated as ΔKE = KE_final - KE_initial.
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