Forces Flashcards
What are contact forces?
Pushing and pulling
What are non contact forces?
Gravity
magnetic force
What does friction do?
Friction acts against the force to make things stop
What is drag?
Drag/air resistance works by objects and air particles colliding, drag slows down the movement of objects
What are force is measured in?
Newtons N
What are balanced forces?
Balance forces means the same force just in different directions
Moves at a constant speed
What are unbalanced forces?
Unbalanced forces means an object will speed up (accelerate) or slowdown
What is the resultant force?
The resultant force is the difference between two forces
What is terminal velocity?
Terminal velocity is the fastest speed you can go
What happens when you are skydiving?
You accelerate and then you go at a constant speed (terminal velocity)
What happens the Fastie fall?
There is more air resistance
What is mass?
Mass is the amount of stuff in object is made up of
What are the units of mass?
Kg
g
mg
What is weight?
Weight is the effect of gravity acting on the mass
Weight is not a force
What force does gravity pull with?
Gravity pulls with a force of
10 N/kg
Gravity has a force of pulling two what together?
Gravity has a force of pulling two different objects together
The bigger the object the bigger the what?
The bigger the object the bigger the gravitational pull
In space what would your weight be?
0 N
What does not change in space?
Your mass does not change in space
What is the formula for speed?
Speed = distance / times
What is the time formula?
Time = distance/speed
What is the distance formula?
Distance = speed * time
Why does your maths not change in space?
Your master is not change because you haven’t taken any stuff away from yourself
Does your weight change in space?
Yes because the gravitational pull varies on each planet
What is a pivot?
A pivot turns around but doesn’t move place
The further away from the pivot you get what is greater?
The further away from the pivot the greater the turning force (moment)
What is the formula for turning force (moment)?
T.F (moment) = force * distance from pivot
What is the formula for distance from pivot?
Distance from pivot = T.F (moment)/force
What is the formula for force?
Force = T.F (moment)/distance from pivot
The smaller surface area the what pressure?
Smaller surface area the higher the pressure
The Large surface area is what pressure?
The larger the surface area to lower the pressure
The formula for pressure?
Pressure = force/area
The formula for force?
Force = pressure* area
The formula for area?
Area = force/pressure
What is the T.F (moment) affected by?
The size of the force (weight)
The distance from the pivot
The lower down to earth and get the atmospheric pressure is what?
The lower down to earth and get the atmospheric pressure is higher
In an aeroplane the air pressure is a lot lower explain this?
The pressure in an aeroplane is a lot lower because you are higher from the earth
