Dynamics Flashcards
(36 cards)
Inelastic
Momentum is conserved, kinetic energy is lost to heat and sound
Elastic
Momentum and kinetic energy are conserved
Principle of linear momentum
For an interaction between two bodies in a straight line momentum is conserved provided there are no external forces acting
Impulse
Product of force and time as-well as the change in momentum
Newton’s first law
An object will remain at rest or moving at a constant speed unless acted on by an unbalanced force
Newton’s second law
A uniform unbalanced force acting on a a mass will produce a uniform acceleration
Momentum
The product of mass and velocity
Total momentum before=
The total momentum after
Tension
The pulling force of a rope chain or wire
Work done
The force applied to move an object a certain distance
Kinetic energy
The energy possessed by a moving object
Principle of the conservation of energy
Energy cannot be create or destroyed only changed from one form to another
Power
The rate at which energy is converted onto other forms
velocity
displacement per unit time
explosions
there is no momentum before so total momentum after must be 0
crumple zones
area of contact that collapses during a collision to decrease time of contact
accelerating up/ decelerating down
weight increases
decelerating up/ accelerating down
weight decreases
why do satellites not fall to earth
the earth curves downwards at the same rate as the satellite so it never lands
what is freefall
when force of gravity is the only force acting when an object
what is newtons law of universal gravitation
the force of attraction between two objects
inverse square law
double the distance and the force decreases by 4
frame of reference
the background against which measurements are made
galilean invarianace
the principle that within a frame of reference the relative motion of objects is the same
