Tell us about the system of actions (algorithm) when solving problems for the application of: a) the law of conservation of momentum;

Tell us about the system of actions (algorithm) when solving problems for the application of: a) the law of conservation of momentum; b) the law of conservation of total mechanical energy.

a)
1 Select reference system
2 Consider a system of interacting bodies
3 Determine the impulses of the bodies of the system before and after interaction
4 Apply the law of conservation of momentum to a system of interacting bodies, write it down in vector form and in projections onto the coordinate axis
5 Solve the equation for the desired physical quantity
6 Substitute numerical data and hang up the answer
b)
1 Select reference system
2 Consider a system of interacting bodies
3 Select at least two positions of the body (system of bodies) and determine for them the kinetic potential and total mechanical energy
4 Determine the zero level of potential energy
5 Write down the equation of the law of conservation of total mechanical energy for the selected position of the body
6 Solve the equation for the desired physical quantity
7 Substitute numerical data and record the answer