Mechanics Flashcards
velocity
speed with direction
speed
rate of change of its position with time
scalar
quantity with magnitude and no direction
principle of moments
in equilibrium sum of clockwise moments = sun of anticlockwise moments
GPE
gravitational potential energy is the energy an object with mas has in relation to another object with mass due to gravity
KE
kinetic energy is energy an object has due to motion
momentum
product of mass and velocity of an object
newton’s first law
objects at rest or in constant motion remain so unless acted by a resultant force
newtons second law
force=mass x acceleration
newtons third law
for every action theres an equal and opposite reaction
conditions for equilibrium
no net acceleration, moments law
principle of conservation of momentum
when two objects collide, total momentum before collision= total momentum after collision
elastic collision
no net loss in kinetic energy in the system as a result of the collision
inelastic collision
kinetic energy is lost as a result of a collision
