Forces & Motion
What is Newton's second law?
Force + Mass x Acceleration
what is kinetic energy
the energy an object has because of motion
what is do waves transfer that matter doesn't
energy
what is current
the flow of electrons through a circuit
what does momentum depend on
mass and velocity
what is gravity
the force pulling objects toward Earth at 9.8 m/s^2
what is potential energy
Energy stored because the object is trying to move but isn't actually moving
what is a crest
the highest point on a wave
what are conductors
materials like copper that allow electricity to flow freely
what is the law of conservation of momentum
the law stating momentum cannot change without outside force
what is inertia
the tendency of an object to resist changes in motion
what is the Law of Conservation of energy
energy cannot be created or destroyed
what are mechanical waves
waves that require a medium to travel
what is an ampere
the SI unit for electric current
what is impulse
measures the change in momentum caused by a force acting over time
Impulse = FΔt
what do forces always occur in
pairs (according to Newtons third law)
what is the equation for kinetic energy
KE = 1/2mv^2
what are transverse waves
a wave where particles move perpendicular to the direction of motion
what is direct current
a type of current that only flows in one direction
what is an elastic collision
A collision where objects bounce apart and kinetic energy is conserved.
what is speed
distance divided by time
what is power and it's equation
the rate at which work is done:
P = W/t
what is the equation for wave speed, frequency, and wavelength
wave speed: v=fλ?
Frequency: f=λ/v
Wavelength: λ=f/v
what is ohm's law
states that voltage equals current times resistance
V = IR
what is an inelastic collision
a collision where objects stick together after impact