Studied by 17 people
Momentum
A vector quantity that has the same direction as the velocity of the object.
Impulse
A vector quantity that has the same direction as the force.
m*v
Momentum’s formula.
F*t
Impulse’s formula.
equal
Momentum is ___ to Impulse.
Elastic Collision
When both momentum and kinetic energy are conserved.
m1v1 + m2v2 = m1v1’ + m2v2’
Conservation of momentum and energy.
½m1v1² + ½m2v2² = ½m1v1’² + ½m2v2’²
Conservation of kinetic energy.
Inelastic collision
When either momentum/kinetic energy is not conserved.
m1v1 + m2v2 = m(1+2) * v(final)
Conservation of momentum not energy.
(m1v1)*cos0
Momentum of one afterwards
Potential energy
Stored energy, the gravitational one is due to the position of an object above the Earth’s surface.
Kinetic energy
The energy of motion.
m*g*h
Gravitational potential energy’s formula.
F*d
Work’s formula.
½m*v²
Kinetic energy’s formula.
Joules
All energy and work is measured in ___.
PE + KE
Mechanical energy’s formula.
mgh = ½*m*v²
Top PE = Bottom KE
Simple machine
An object or mechanical device that receives an input amount of work and transfers the energy to an output amount of work.
Inclined plane
The simple machine consisting of a sloping surface, used for raising heavy bodies
Screw
An inclined plane wrapped around a cylinder.
Wedge
Essentially two inclided planes back to back.
Lever
The simple machine that is consisted of an inflexible of material placed over a pivot point called a fulcrum.
Pulley
A wheel on an axle that is designed to rotate with movement of a cable along a groove at its circumference.
Wheel and axle
The simple machine that is composed of two connected cylinders of different diameters.
W/t = F*v
Power’s formula.
E = (out/in)*100% = (AMA/IMA)*100%
Efficiency’s formula.
IMA = d(in)/d(out)
The ideal mechanical advantage’s formula.
AMA = F(out)/F(in)
The actual mechanical advantage’s formula.
W(in)/t
Effort power.
W(out)/t
Resistance power.
F(in)*d(in)
Effort work.
F(out)*d(out)
Resistance work.
F(out)/IMA
Effort force’s formula
Power
The rate at which work is done or the rate at which energy is transformed.
Work
The transfer of energy by a force acting on an object as it is displaced.
Note 
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