1. Be able to recognize the relationship between impulse, average force and time

Question

1. Be able to recognize the relationship between impulse, average force and time. Be able to use this relationship to solve problems.

2. Be able to recognize the relationship between impulse and the change in momentum of an object. Be able to use this relationship to solve problems.

3. Be able to state the conditions when momentum is conserved. Be able to work conservation of linear momentum problems in one dimension.

4. Be able to state the two types of collisions and for which type conservation of kinetic energy applies. Be able to identify a completely inelastic collision.

5. Be able to work problems involving conservation of momentum for the collision and conservation of mechanical energy for the events following the collision.

6. Be able to calculate the x and y coordinates of the center of mass for a system of discrete particles.

Explanation / Answer

1) impulse = Fav*t

2) impulse = Fav*t = m(v2-v1)

3) when the net force acting on a system is equal to zero, the total momentum of
the system is conserved.

4)
elastic collision: the collision in which Kinetic energy and momentum both are
conserved.

ineleastic collision: the collision in which momentum only conserved.


complete inelastic collision: the collision in which after the collision both bodies stick and move together

5)

m1*u1 + m2*u2 = m1*v1 + m2*v2

6)

Xcm =( m1*x1+m2*x2+m3*x3....)/(m1+m2+m3+...)

Ycm = (m1*y1+m2*y2+m3*y3....)/(m1+m2+m3+...)

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