Momentum Informally: A measure how hard it would feel to be hit by that thing Formally: p = momentum (a vector) m = mass v= velocity Units of Momentum => [kg][m/s] = [kg*m/s]

Comparing Momentum Neither Both have p = 10,000 kg·m/s Which has more momentum? 10,000 kg bus with v = 1m/s 2,000 kg car with v = 5m/s Neither Both have p = 10,000 kg·m/s

The player has p = 60 kg·m/s Comparing Momentum Which has more momentum? 60 kg referee with v = 0 m/s 30 kg player with v = 2 m/s Player The player has p = 60 kg·m/s The referee has p = 0.

Cart A: m = 2kg v = 3 m/s p = 6 kgm/s Cart B: m = 3kg v = 2 m/s

Handing Labs and other things back Complete the momentum handout while you collect your labs

Labs so far (number them!) 1. Safety Lab 2. Scientific Method (Farmer and the Seeds) 3. Measurement Lab 4. Domino Effect 5. Free Fall Lab 6. Reaction Time Lab 7. Projectile Launcher Lab 8. Pendulum Lab 9. Mass and Weight Lab