Forces and motion: Laws of motion and momentum Flashcards
1
Q
What is Newtons first Law
A
An object will remain at rest or continue to move with a constant velocity unless acted upon by a resultant force
2
Q
what is newtons third law
A
when 2 objects interact, they exert equal and opposite forces on each other of the same type
3
Q
how is momentum defined as
A
momentum = mass x velocity
4
Q
what is the unit of momentum
A
kg ms^-1
5
Q
define the conservation of momentum
A
when 2 objects collide, the total momentum of the system remains constant
6
Q
what is an perfectly elastic collision
A
an elastic collision is where all kinetic energy is conserved
7
Q
what is newtons second law defined as
A
the resultant force acting on an object is directly proportional to the rate of change of momentum.
8
Q
define the impulse of a force
A
Impulse = the chaneg in momentum
