6.1: Compare the momentum of different moving objects
6.1: Compare the momentum of different moving objects
Do Now:
1.
Write down an explanation, using the physics terms you know, of why we don't use a ping pong ball for bowling.
Let's see what our friend Bill has to say...
As we watch, pay attention to the physics terms Bill uses!
http://www.youtube.com/watch?v=y2Gb4NIv0Xg
6.1: Compare the momentum of different moving objects
6.1: Compare the momentum of different moving objects
Momentum:
Objectives:
p=mv
1. Define momentum.
2. Compare the momentum of different moving objects.
6.1: Compare the momentum of different moving objects
The quantity of motion of a moving body
6.1: Compare the momentum of different moving objects
Momentum:
Momentum:
p=mv
p=mv
The quantity of motion of a moving body
The quantity of motion of a moving body
What are the UNITS of momentum?
Fun fact:
"p" comes from German mathematician Gottfried Leibniz ­ he used the term "progress" to mean "the quantity of motion with which a body proceeds in a certain direction."
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6.1: Compare the momentum of different moving objects
Everyday Use:
6.1: Compare the momentum of different moving objects
You Try:
Calculate the momentum of a 63.5 kg cheetah running at 27.8 m/s (about 62 mph).
"gathering momentum"
"picking up speed"
6.1: Compare the momentum of different moving objects
You Try:
Calculate the momentum of a 0.03 kg snail moving at a speed of 0.013 m/s (0.03 mph).
6.1: Compare the momentum of different moving objects
Do you think it is possible for a bowling ball and a ping pong ball to have the same momentum?
6.1: Compare the momentum of different moving objects
The mass of a ping pong ball is 0.0027kg.
6.1: Compare the momentum of different moving objects
The mass of a bowling ball is 5.9 kg.
The velocity of a bowling ball is 7.6 m/s.
How fast must the ping pong ball go to have the same momentum as the bowling ball?
m = v
V
m
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6.1: Compare the momentum of different moving objects
Exit Ticket (due at the end of class):
1. Define momentum
2. How can you compare the momentum of different moving objects?
Homework: Practice A (Pg. 199): #1­3
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