P5 Flashcards
planets stay in orbit around the sun because of
gravitational attraction
what is centripetal force
the force that keeps planets in orbit
the larger the mass the greater/smaller the gravitational force
greater
the further away an object the greater/smaller the gravitational force
smaller
the orbit time for a planet close to the sun is less because (2)
the planet travels a shorter distance
the planet travels faster as there is a greater gravitational force
a satellite moves at a
tangent (if you don’t know what it is you are dumb)
what is a polar orbit?
How long does a full orbit take?
what is it used for
when a satellite orbits above both poles
90 minutes
imageing the earth (short range weather)
geostationary satellites orbit above
how long does a full orbit take
what is it used for
the equator
24 hours
communications
why cant geostationary satellites be too close together
because there signals will overlap due to diffraction
LOOK AT EQUATION FOR DISTANCE TRAVELED BY SATELITE
LOOK AT IT !!!!!!!
REVISE SUVAT EQUATIONS
LOOK AT IT!!!!!!
what is the difference between a scalar and a vector
a scalar has magnitude only —– 20 m/s
a vector has magnitude and direction —– 20 m/s due north
speed in a direction is called
velocity
LOOK AT ADDING NON-LINEAR VETORS
LOOK AT IT
if a ball is thrown EXACTLY horizontally (90o) and a the exact copy of that ball was dropped at the same time which one will hit the ground first
TRICK QUESTION
they will both hit the ground at the same time
as both balls accelerate towards the ground at the same speed
