Higher, Faster, Stronger Flashcards
Scalar
Has only a magnitude
Vector
Has a magnitude and a direction
Uniform Acceleration
Acceleration is constant throughout, we can use SUVAT to work out
SUVAT (no S)
v=u+at
SUVAT (no U)
s=vt-1/2at^2
SUVAT (no V)
s=ut+1/2at^2
SUVAT (no A)
s=(u+v)/2*t
SUVAT (no T)
v^2=u^2+2as
Newton’s First Law
Every body continues in a state or rest or uniform motion (constant velocity) unless a resultant force acts on it
Newton’s Second Law
F=ma
Newton’s Third Law
If object A exerts a force on object B then object B will exert and equal and opposite force on object A (every action has an equal and opposite reaction)
Displacement Time Graphs
Gradient is velocity
Force Pairs
- forces acting on the same object
- equal in size (same magnitude)
- act in the same line of action
- opposite in direction
- of the same type (e.g. both electrostatic or gravitational)
Equilibrium
the net force equals zero
Elastic
Stretch when put under tension and return to original shape/size when load removed
Strong
Require a large tension to break them
Hooke’s Law on a graph
- must pass through the origin
- are linear with a constant gradient
Hooke’s Law
Force is proportional to extension so there must be a constant ‘k’ which is stiffness
Limit of proportionality
Where the graph showing Hooke’s Law starts to significantly deviate
Kinetic Energy
energy an object has because of movement
Potential Energy
energy a body has due to its position or arrangement (height - gravitational)
Elastic energy from a graph
area under a force extension graph
When is using SUVAT suitable?
only when the acceleration is constant
What are the base units?
- Length [m]
- Mass [kg]
- Time [s]
- Current [A]
- Temperature [K]
- Amount [mol]
