Momentum and Impulse Momentum Inertia Impulse Newtons Second

Momentum and Impulse Momentum Inertia Impulse Newton’s Second Law • Importance of follow through • Applications • •

Momentum • A team is said to have Momentum if they are “on a roll, ” or “hard to stop. ”

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Momentum • _____ • Any moving body has momentum

Momentum • An object’s momentum depends on its mass and how fast it is moving. A truck traveling 5 km/h has more momentum than a Smart car at the same speed because it is harder to stop.

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Linear Momentum • The linear momentum …………… • Where m is the mass in kg • v is the velocity in m/s • What are the units of momentum?

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Check Your Understanding • Determine the momentum of a Pacific leatherback turtle of mass 8. 6 x 102 kg, swimming at a velocity of 1. 3 m/s [forward]

Check Your Understanding A car possesses …………. a) its velocity was doubled. b) its mass was …………… c) its ………….

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Will it break?

From Newton’s Second Law

• ____ • Its direction is the same as the change in momentum

Impulse • Impulse = FnetΔt • _______ • If you increase Δt, Fnet will decrease – If you are trying to catch a ball and you move your hands back with the ball as it approaches, you will increase the time needed to stop the momentum and thus, decrease the F required hurts less!

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The importance of “follow through”

“Riding the Punch” ______

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Air Bags

Check Your Understanding • A baseball of mass 0. 152 kg, travelling horizontally at 37. 5 m/s [E], collides with a baseball bat. The collision ………. . a) Determine the momentum of the baseball just prior to being hit. b) What is the ……….

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