WORK, POWER, IMPULSE, MOMENTUM, ENERGY
IMPULSE
Work is the displacement of an object caused by an applied force. The displacement of the object will always be in the direction of the force.
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Work = Force * Displacement
Work = Fnet * s
Work is measuered in Joules (J)
COLLISIONS
Power is how fast one does work.​
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Power = Work / Time
Power = work / t
Power is measuered in Watts
MOMENTUM
Momentum is what causes an object to move. If an objects velocity changes, its momentum changes.
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If a force is applied in an opposite direction, an objects momentum will change.
To reduce the force necessary to make a large change in momentum, exert a smaller force over a larger time.​
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Momentum = Mass * Velocity
P = m* Δv
Momentum is measuered in kg*m/s
MOMENTUM-IMPULSE
Impulse is the change of momentum of an object.
Impluse is the amount of force applied over a specific time.
The force applied over an amount of time causes an object to move
f * Δt = m * Δv
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Impulse = Force * Time
i = F*Δt
Impulse is measuered in Newton-seconds
The law of conservation of momentum states that the combination of momentum of objects before a collision is the same as the momentum after a collision.
Elastic- objects separate after the collision
Example- bouncy ball hitting floor
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Inelastic- objects collide and stick together
Example- magnets
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Here, the balls experienced an elastic collision, while the girls experienced an inelastic collision:
WORK-POWER
WORK
POWER
KINETIC ENERGY
"The energy that a moving object has to do work to another object."​
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K.E. = (mass * velocity^2) / 2
K.E. = (m * v^2) / 2
Kinetic Energy is measuered in Joules (J)
GRAVITATIONAL POTENTIAL ENERGY
The potential energy an object has only because it is lifted off of the ground​
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G.P.E. = mass * gravity * height
G.P.E. = weight * height
G.P.E. = m * g * h
G.P.E. = w*h
Gravitational Potential Energy is measuered in Joules (J)