Moments and Momentum Chapter 3 Flashcards
1
Q
What is principle of moments?
A
In equilibrium, sum of clockwise about any point, is equal to sum of anticlockwise
2
Q
What is newtons 1st law?
A
A body will remain at rest or continue to move with constant velocity unless until acted by an external
3
Q
What is newtons 2nd law?
A
Resultant force is directly proportional to the rate in change in momentum
4
Q
What is newtons 3rd law?
A
When 2 objects interact, each exerts an equal but opposite force on the other during the interaction.
5
Q
What is a couple?
A
A pair of equal and opposite coplanar forces.
6
Q
What is the equation for momentum when 2 objects are exploded?
A
0= m1v1 + m2v2
7
Q
What is the equation for momentum when two objects collide?
A
m1u1 + m2u2 = m1v1 + m2v2
