P5 - Forces (incomplete) Flashcards
What is the difference between weight and mass?
Weight is dependant on gravity
What is resultant force?
Overall force acting on an object
How can you tell the resultant force from a horizontal and a vertical component?
Find the hypotenuse
What is a limit of proportionality?
When an elastic object no longer returns to its original shape after being streched on compressed
What is another name for the moment of a force?
The turning effect
What causes an object to float?
When the weight is equal to or less than the upthrust
Why do potatoes sink in water?
They are more dense than water
What does pressure in a liquid depend on?
Depth, density and gravity
Does atomospheric pressure increase or decrease with pressure?
Decrease
What kind of measurement is displacement?
Vector
What is the equation of acceleration?
Change in velocity / time
What is the equation for the pressure of a liquid?
Pa = height of liquid column x density x gravity
What is Newton’s 1st law?
An object is at rest or constant velocity unless acted on by a resultant force
What is Newton’s 2nd law?
F = mass x acceleration
What is Newton’s 3rd law?
Every reaction has an equal and oppsite reaction
