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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Presentation transcript:

Warm Up What is the velocity of MMA fighter Bas Rutten if his punch is thrown forward at .12 seconds traveling 1.5 meters

Varying Speed Speed that changes during movement of an object

Acceleration A change in velocity Speeding up Slowing down Positive acceleration Slowing down Negative acceleration Deceleration

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

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?

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

p v m Calculating Momentum Momentum = mass x velocity In symbols: p = mv Common units of momentum: kg•m/s p m v

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?