unit 1
what is the difference between a sector and a vector?
A sector is just magnitude while a vector is magnitude and direction.
what axis does time and distance go on a distance/time graph?
time: x-axis
distance: y-axis
the SI unit for velocity.
v=m/s
what are energy transformations?
processes that convert energy from one type to another.
what is power?
the rate of which work is performed.
what does KHDUDCM an acronym for? (along with the root word of each unit)
King (Kilo) Henry (hecto) Died (deca) Unexpectedly (Unit) Drinking (deci) Chocolate (centi) Milk (milli)
what does a horizontal straight line mean on a distance/time?
not moving/stationary
equation for velocity
v=AxT or DT
what is the definition of work?
energy is transformed into an object when a force acting on an object moves it through a distance.
what is the formula for impulse?
F x change in time
difference between displacement and distance.
Displacement is the length between the starting and ending points. Distance is how ever much area you cover.
what does an upward-curved line mean on a distance-time graph?
gaining speed in a positive direction.
a driver starts his parked car and within 5 seconds the driver reaches a speed of 30 m/s. What is his acceleration?
6 m/s/s
what is thermodynamics? (1st and 2nd laws) and examples
1st: total energy in a system remains constant, open system, closed system, isolated system
2nd: heat flows from hotter to colder, heat goes into cold
what is the formula for the change in momentum?
m x change in velocity
what is the technical term for speed?
a scalar value that tells you the rate at which an object has covered a distance.
formula for time
T=D/S
what is a vertical line on a velocity-time graph?
a change/jump of velocity instantly.
what is entropy?
unusable energy that is lost in any transfer of energy
how much horsepower is in kilowatts?
1 kilowatt is 1.34 horsepower
what is magnitude?
the great size or extent of something.
what does a diagonal line on a velocity-time graph mean?
constant velocity.
How is direction shown on a velocity-time graph?
Above the x-axis is a horizontal on the positive side
below the x-axis is horizontal in the negative
17 years= 8935200 minutes
what is newtons third law?
every action there is an equal and opposite reaction.