1What does newtons 3rd law state?
If body A exerts a force on body B, then body B will exert an equal and opposite force on body A
2What does the principle of conservation of momentum state?
momenta of the bodies is constant provided there is no resultant external force
3What is an isolated/closed system?
A system where no external forces act and no particles enter or leave
4What is the momentum triangle?
p
m | v
5What is mass a measure of?
a scalar quantity that measures the bodys inertia
6What type of quantity is momentum?
Vector quantity
7What is the unit of momentum?
kg m s -1
8What is it called when colliding objects stick together?
Inelastic collisions
9What is it called when colliding objects bounce apart?
Elastic collision
10What do inelastic collisions result in a loss of?
Kinetic energy
11What is maintained in elastic collisions?
Kinetic energy
12What is a force?
a push or a pull which causes the motion of a body
13What is newtons third law used to explain?
Rocket propulsion
14What diagram links to newtons 2nd law?
Free body diagram
15Whats the equation for newtons second law?
sigma F=ma
16What is the resultant force on a body in a direction equal to?
The mass of the body x acceleration of body in that direction
17What is force the rate of change of?
momentum
18What is the normal contact force?
When a object is resting on a surface, the surface exerts a force on the object
19Why does the normal contact force happen?
Molecules in the two bodies are in close contact, the outer electrons are repelling eachother
20What is the equation triangle for linear momentum?
p
m | v
21What is the unit for linear momentum?
kgms^-1
22In which direction is momentum?
The direction of the velocity
23How do you know if a particle is going the opposite way after a collison?
If one the speeds is negative