Forces Flashcards
(30 cards)
What is a force?
A push, pull or twist
how do you find mass?
Density x volume
how do you find volume?
mass / density
how do you find density?
mass / volume
how do you find speed?
distance / time
how do you find distance?
speed x time
how do you find time?
distance / speed
speed
mph, m/s, cm/day, cm/s, km/h
distance
miles, km, m, cm
time
hours, day, seconds
what is friction?
the force between two surfaces sliding over one another, that causes them to heat up and wear
what is weight?
the force that pulls objects towards the centre of the Earth
What is air resistance/ drag?
a force acting against any object that is moving through the Earth’s atmosphere
What is lift?
a force pushing upwards on an object flying in the air
What is upthrust?
a force pushing upwards on an object in a liquid
never say 1
fair test
never say 2
valid experiment
what is thrust?
a push caused by an engine
what is push/pull?
a force exerted to move an object away or towards another object
what does compress mean?
to squash into a smaller space
what is gravity?
a non-contact force that acts between two masses
what is mass?
the amount of matter (stuff) a thing is made up of
what is a newton?
the unit of force, symbol N
what does balanced mean?
forces acting on an object that are the same size but act in opposite directions
