contact and non contact

Cards (18)

what is a force
a push or pull
what can a force do to an object
-change shape
-change speed
-change direction
what are the units of force
Newtons (N)
what is a contact force
a force that occurs when particles are touching eachother
what are some examples of contact forces
friction
air resistance
tension
what is a non contact force
a force that acts when particles are not touching
examples of non contact forces
magnetic force
gravitational force
electrostatic force
what are examples of vector quantities
-velocity
-acceleration
-force
-displacement
-momentum
-weight
what do vector quantities have
size and direction
what are examples of scalar quantites
-speed
-distance
-time
-mass
-energy
-temperature
how do we represent vectors
using an arrow
what does the lenght of an arrow tell us
length of an arrow represents magnitude (size) of vector
what does direction of arrow tell us
direction of arrows us direction of vector
what is displacement 
distance in a specific direction
e.g a person running 40m East
what is velocity 
speed in a given direction
e.g. person cycling 6m/s East
what does a negative velocity tell us
negative velocity tells us they're traveling backwards
what is newtons thirds law
when two objects interact the force they exert on eachother are equal and opposite
what is an interaction pair
a pair of forces that are equal and opposite and act on two interacting objects
e.g. the sun and the earth are attracted to eachother by the gravtational force