Forces and Motion Flashcards
Friction equation?
Difference when slipping?
F(friction)=μs.R
When slipping: F(friction)=μd.R
μs>μd
Translational equilibrium
Net force is 0N
Newton’s second Law
this is where weight comes from: the net force acting on an object can be found by multiplying A and mass
Newton’s third law
When one object exerts a force on a second object, the second object simultaneously exerts a force equal in magnitude and opposite in direction on the first object.
Forces ALWAYS come in pairs
Define work
The total energy transferred by a force acting in the direction of displacement
define Potential energy
The total energy in a system based on the relative positions of its parts
Define elastic potential energy
Total energy done by stretching something
Total energy in a system
Sum of all kinetic and potential energies
What is power
The rate at which work is done- Fd or E/T
What is impulse
The change in momentum, or Force times time
What is the law of conservation of momentum
The vector sum of all momenta in a closed system is conserved (remains constant
Laws of collision
What is an elastic collision?
What is a perfectly inelastic collision
Momentum is conserved, not always KE
Elastic- No loss of KE- Only possible when masses are the same
Inelastic- The objects stick together, most loss of KE
