Work (12) (ELCA)
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- Work — the application of a force that results in the movement of an object in the direction (or opposite direction) of the force.
What is required for work?
- Movement
- Must be parallel movement to the force exerted.
- When the force applied is the opposite to the direction of motion, the force is negative.
Important Background InformationEdit
VectorsEdit
- – acceleration
- – Final Velocity
- – Initial Velocity
- – Change in Time (s)
- – distance (m)
- – Initial Velocity
- – Final Velocity
- – Change in Time (s)
ForceEdit
- – Force (N)
- – Mass (kg)
- – acceleration
- - Force of gravity
- - mass (kg)
- - Gravity
- - Angle of Object / Slope (º)
- - Net Force (N)
- - Force of Gravity
- - Force of Friction (N)
- - Net Force (N)
- - Mass (kg)
- - Gravity
- - Angle (º)
- - Force of Friction (N)
WorkEdit
Work (W) = Energy Applied (E)
- = Work (J)
- = Force (N)
- = Distance (m)
Direction of Force | Change |
---|---|
Force is in the direction of motion | Positive |
Force opposes motion | Negative |
Force is 90º to motion | No Work |
Object does not move | No Work |
Kinetic EnergyEdit
Solve for Kinetic EnergyEdit
- = mass (kg)
- = velocity
- = Kinetic Energy (J)
- = mass (kg)
- = velocity
- = Kinetic Energy (J)
- = mass (kg)
- = velocity
- = Kinetic Energy (J)
Net WorkEdit
- = Net Work (J)
- = change in Kinetic Energy (J)
- = Final Kinetic Energy (J)
- = Initial Kinetic Energy (J)
- = Net Work (J)
- = Mass (kg)
- = Final Velocity
- = Initial Velocity
Potential EnergyEdit
- Potential Energy () – stored energy that can be used at some later time.
Gravitational Potential EnergyEdit
- Gravitational Potential Energy () – potential energy due to position above the Earth's surface.
- = Potential Gravitational Energy (J)
- = mass (kg)
- = gravity
- = height (m)
- = Potential Gravitational Energy (J)
- = mass (kg)
- = gravity
- = height (m)
- = Potential Gravitational Energy (J)
- = mass (kg)
- = gravity
- = height (m)
Elastic Potential EnergyEdit
- Elastic Energy() – potential energy due to elasticity.
- = Elastic Energy (J)
- = Spring Constant
- = Stretched Length (m)
- = Elastic Energy (J)
- = Spring Constant
- = Stretched Length (m)
- = Elastic Energy (J)
- = Spring Constant
- = Stretched Length (m)
Mechanical EnergyEdit
- Mechanical Energy - The sum of all the potential and kinetic energies in a system.
- - Initial Mechanical Energy
- - Finial Mechanical Energy
- - Initial Potential Gravitational Energy
- - Initial Potential Elastic Energy
- - Initial Kinetic Energy
- - Final Potential Gravitational Energy
- - Finial Potential Elastic Energy
- - Final Kinetic Energy
PowerEdit
- Power – the rate at which work is performed or energy is transmitted, or the amount of energy required or expended for a given unit of time.
- – Power (W)
- – Work (J)
- – Time (s)
- – Power (W)
- – Force (N)
- – Velocity
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