1.3 dynamics Flashcards
1
Q
newtons 3rd law
A
when a body A exerts a force on a body B, then B exerts an equal and opposite force on A
2
Q
newtons 2nd law
A
the rate of change of momentum of an object is proportional to the resultant force on it, and takes place in the direction of that force
3
Q
newtons 1st law
A
an object continues at rest or in uniform motion unless it is acted upon by a resultant force
4
Q
difference between elastic and inelastic collisions
A
elastic - KE is conserved, KE before collision = after it
inelastic - KE not conserved - transferred to other forms and KE before and after arent equal
5
Q
momentum equation
A
mass x velocity
6
Q
what is rate of change of momentum equal to
A
force
7
Q
what is impulse
A
Ft = mv
8
Q
area under force time graph
A
impulse / change in momentum
