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Published bySofie Küchler Modified over 6 years ago
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Warm Up What is the velocity of MMA fighter Bas Rutten if his punch is thrown forward at .12 seconds traveling 1.5 meters
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Varying Speed Speed that changes during movement of an object
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Acceleration A change in velocity Speeding up Slowing down
Positive acceleration Slowing down Negative acceleration Deceleration
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Acceleration = any change in speed OR direction!
Example of Acceleration: How velocity changed: A plane taking off Increase in speed Car stopping at a light Decrease in speed (deceleration) Walking around Change in direction a corner A Ferris wheel Change In direction
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Momentum What is momentum?
The San Diego Chargers have momentum entering the final weeks of the season… Anything that is moving has momentum Depends on what?
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Momentum The momentum of an object: -Depends on the object’s mass.
Mass is the amount of matter in an object and - Depends on the object’s velocity. Velocity is speed in a given direction
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p v m Calculating Momentum Momentum = mass x velocity In symbols:
p = mv Common units of momentum: kg•m/s p m v
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Determine the momentum of a ...
A) 60-kg person moving eastward at 9 m/s. p = m • v p = 60 kg x 9 m/s = 540 kg·m/s east B) 1000-kg car moving northward at 20 m/s. p = 1000 kg x 20 m/s = 20,000 kg·m/s C) 40-kg dog moving southward at 2 m/s. p = 40 kg x 2 m/s = 80 kg·m/s Which has the most momentum?
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