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