Let

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Lets start with everyday language

• What do you say when a sports team is on a roll?
• They may not have the lead but they may have
  ___________
• MOMENTUM
• A team that has momentum is hard to stop.

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Momentum
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Newtons First Law

• A body in motion stays in motionunless acted
  upon by an unbalanced force
• Momentum will only deal with inertia in motion

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Which hurts more if he hits you?

• Use the words mass and velocity

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What is Momentum?

• An object with a lot of momentum is also
• hard to stop
• Momentum p mass x velocity
• Units kgm/s
• Momentum is also a vector (it has direction)

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True or False? Pmv

• Something massive moving fast carries a lot of
  momentum

• True

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True or False Pmv

• Something REALLY massive moving slowly carries
  a lot of momentum.

• True

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True or False P mv

• True

• Something with little mass doesnt carry much
  momentum unless it goes fast

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True or False Pmv

• An object at rest has a very small amount of
  momentum

• False, it has no momentum

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Review

• Which has greater momentum?
• Bubble Wrecking Ball

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Lets practice Pmv

• A 1200 kg car drives west at 25 m/s. What is the
  cars momentum?
• Identify the variables
• 1200 kg mass
• 25m/s, west velocity
• P mv 1200 kg x 25 m/s 30 000 kg- m/s, west

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A Project

• Get with your partner
• Divide your paper into 8 squares (hotdog,
  hamburger, hamburger)
• On the top put objects with a lot of momentum
• On the bottom, their opposites

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Momentum

• LARGE AMT OF MOMENTUM
• Large Mass Large Mass High
  Velocity High Velocity
• SMALL AMT OF MOMENTUM
• Small Mass Small Mass Low
  Velocity Low Velocity