1What is a vector?
Something with a direction and magnitude
2Which quantities are vector quantities?
force, velocity, displacement, acceleration, momentum
3what are scalar quantities?
Something with NO direction and ONLY MAGNITUDE
4what are scalar quanitities?
speed, distance, mass, temperature, time
5What can forces be?
contact or non contact
6What is a force?
a push or a pull on an object that is caused by it interacting with something
7What is a contact force?
when two objects are touching
8what are some examples of contact forces?
friction, air resistance, tension in rope, normal contact force
9what is a non contact force?
when two objects do not need to be touching
10what are some examples of non- contact forces?
magnetic force, gravity, electrostatic force
11What is an interaction pair?
a pair of forces that are equal and opposite and act on two interacting objects
12what is gravitational force?
force of attraction between masses
13What 2 effects do gravity have?
1) on the surface of the planet, it makes things fall to the ground
2) it gives everything a weight
14Are weight and mass the same?
NO NO NO NO NO NO NO NOOO
15What is the difference between mass and weight?
mass is just 'the amount of stuff' in an object and for any given object it will have the same value anywhere in the universe.
weight is the force acting on an object due to gravity.