Extra close brace or missing open brace
Extra close brace or missing open brace
Extra close brace or missing open brace
Extra close brace or missing open brace
☚
Impulse and Momentum Problems
Chapter 6
Energy
☛
Chapter 5: Impulse and Momentum
3.
Collision Problems
Start with momentum conservation:
p
→
i
=
p
→
f
. If there are two objects, then
m
1
v
1
i
+
m
2
v
2
i
=
m
1
v
1
f
+
m
2
v
2
f
Fill in what is given, and solve for what's left.
Notice that the masses
m
1
and
m
2
appear on both sides of the equation.
Remember that the velocities have direction and therefore
sign
: + or -.
If the two objects "stick together" after the collision, then they have the same velocity:
v
1
f
=
v
2
f
If the problem involves something that comes apart (like a bomb), then their
initial
velocities are the same:
v
1
i
=
v
2
i