What is momentum?broncphysics.weebly.com/uploads/2/3/3/4/23345212/9... · 9.1 Impulse and Momentum...
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9.1 Impulse and Momentum
PHYSICS 1 1
January 17, 2019
UNIT 9
Impulse and MomentumLEARNING TARGET DESCRIPTION
9.1I can define, analyze, and solve problems involving impulse and linear momentum.
A car is cruising down Grand Avenue toward you, at a speed of 16 m/s (~35 mph).
Can you stop it by standing in front of it and holding out your hand?
Impulse and Momentum
What ismomentum?
Headlines
"The Broncs are gaining momentum as they head to the state tournament."
p = m v
MomentumMomentum is mass in motion!
Momentum is equal to the mass of an object times the object's velocity.
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9.1 Impulse and Momentum
PHYSICS 1 2
January 17, 2019
MomentumVector or Scalar?
Units?
Relationship?
p = m vChanging Momentum
Changing Momentum
Impulse = Δp = pf pi
Change inMomentumImpulse =
ImpulseMomentum Theorem
F = m a
ImpulseMomentum Theorem
F Δt = pf pi
Bear and Bouncy Ball
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9.1 Impulse and Momentum
PHYSICS 1 3
January 17, 2019
IN CLASS PROBLEMSCalculate the momentum of the following objects:
1. 110kg football player running at 8.00 m/s.2. How fast would you need to throw a 0.410kg football so that
it has the same momentum as the football player?
3. A hockey puck has a mass of 0.115 kg and strikes the pole of the net at 37 m/s. It bounces off in the opposite direction at 25 m/s.a) What is the impulse on the puck?b) If the collision takes 5.0 x 104 s, what is the average force on
the puck?
Calculate the momentum of the following objects:
1. 110kg football player running at 8.00 m/s.
2. How fast would you need to throw a 0.410kg football so that it has the same momentum as the football player?
IN CLASS PROBLEMS
A hockey puck has a mass of 0.115 kg and strikes the pole of the net at 37 m/s. It bounces off in the opposite direction at 25 m/s.
a) What is the impulse on the puck?
b) If the collision takes 5.0 x 104 s, what is the average force on the puck?
IN CLASS PROBLEMS
PRACTICE PROBLEMS (14)