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Conservation of Momentum
Newton Collider
#23  Recoil Problem  When interacting objects start from
rest

"What is the total momentum
before
cannon is
fired?"
"Total momentum after clown is fired?"

Larger

"Total momentum
before=0. (at rest)
"Total momentum after
= 0. (momenta are
equal but opposite.)"

Rifle Recoil
Dr. Dave's Hall of Fame

"In real life, it would be
foolish to shoot a
rifle
like this. Why?"


"The recoil on that rifle
would
throw the
shooter's shoulder out!"

Ex 1) A 4.0 kg rifle fires a
5.0 x 10^{3
}kg bullet at a
velocity of 500. m/s. What is the velocity acquired by the
rifle?

(Not in Reference Table)
Momenta before/after= 0 before
Equal Mass
cars_explosion.mpg
W.F.U.
Total momentum after = 0 ??
carsExplosionUneq.mpg
W.F.U.

What is the
velocity
of the cannon
below?

m_{1}v_{1}
= m_{2}v_{2}
500 kg(V1) = 100 kg(15 m/s)
V_{1} = 3 m/s
Energy
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