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Momentum General Physics

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Momentum and Impulse Need a force over a period of time to change an object’s momentum

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MomentumGeneral Physics

Momentum

• Mass in motion• Symbol: p• Equation: p = mv• Units: kg x m/s• Vector quantity

Momentum and Impulse

• Need a force over a period of time to change an object’s momentum

Page 4: Momentum General Physics. Momentum Mass in motion Symbol: p Equation: p = m v Units: kg x m/s Vector quantity

Impulse-Momentum Change Equation

• F = ma• F = mv/t• Ft= mv = pf-pi

• Impulse = change in momentum

Page 5: Momentum General Physics. Momentum Mass in motion Symbol: p Equation: p = m v Units: kg x m/s Vector quantity

Real-Life Application

• Following through while swinging a bat

• Airbags• Nylon ropes in rock climbing

Page 6: Momentum General Physics. Momentum Mass in motion Symbol: p Equation: p = m v Units: kg x m/s Vector quantity

Conservation of Momentum

• In a closed system: momentum of objects before a collision = momentum after collision

• pAi + pBi = pAf + pBf

Page 7: Momentum General Physics. Momentum Mass in motion Symbol: p Equation: p = m v Units: kg x m/s Vector quantity

Elastic Collision• Objects do not stick to each

other• Kinetic energy remains the

same• http://

www.physicsclassroom.com/mmedia/momentum/cthoe.cfm

http://www.physicsclassroom.com/mmedia/momentum/cthoe.cfm

Page 8: Momentum General Physics. Momentum Mass in motion Symbol: p Equation: p = m v Units: kg x m/s Vector quantity

Inelastic Collision

• Objects stick together• Some kinetic energy is

converted to thermal energy• http://

www.physicsclassroom.com/mmedia/momentum/cthoi.cfm

http://www.physicsclassroom.com/mmedia/momentum/cthoi.cfm

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