Physics 03-06 Impulse and Momentum Name: = FA: Unit: Ns [s 3 Both and play role in how responds to Linear Momentum p = rm1 Unit: kg m/s [5 a [5 important when talking about Impulse-Momentum Theorem FAt = muf moo = change in Find change in momentum 0 Use and of contact to nd average of contact A baseball (m = 0.14 kg] with initial velocity of -40 m/s {90 mph] is hit. It leaves the bat with a velocity of 60 m/s after 0.001 s. What is the impulse and average net force applied to the ball by the bat? A raindrop {m = .001 kg) hits a roof of a car at -15 m/s. After it hits, it spatters so the effective nal velocity is 0. The time of impact is .01 5. What is the average force? What if it is ice so that it bounces off at 10 m/s? 1. Two identical automobiles have the same speed, one traveling east and one traveling west. Do these cars have the same momentum? Explain. 2. Two objects have the same momentum. Do the velocities of these objects necessarily have (a) the same directions and (b) the same magnitudes? Give your reasoning in each case. 3. (a) Can a single object have kinetic energy but no momentum? (b) Can a system of two or more objects have a total kinetic energy that is not zero but a total momentum that is zero? Account for your answers