Physics Flashcards
What forces do?
Forces cause objects to move or change direction
Forces measure in?
Newtons
Instrument used to measure force?
Newtonmeter
Contact forces?
Air resistance, upthrust, friction
Non-contact forces?
Gravity, Magnetic
What does “Interactive pairs” mean?
One pair pulls and one pushes e.g. hanging from a bar
Define a contact force?
A force that acts when it touches something
Define a non-contact force?
A force without contact
Difference between balanced and unbalanced force
- Balanced has the same size force pulling in different directions
How to calculate resultant force
Newton difference between pulling in opposite direction
When is an object in equilibrium
When the pulling forces are equal the object is in equilibrium
Describe a situation when something is in equilibrium?
Someone laying down
Describe what speed is?
Speed is the distance you travel in a particular time
What unit is speed measured in?
Metres per second, m/s
What is the formular of speed
speed = distance (m) / time (s)
Describe relative speed
How fast one object is travelling compared to another
What is acceleration
Acceleration shows how quickly our speed changes over time
Gravity unit of measurement
N/kg
