Alex Morgan, one of America's best forwards, kicks a 450. g soccer ball that was moving towards her at a speed of 12.0m/s, the impact caused the ball to leave her foot with a velocity of 20.0 m/s in the opposite direction. a. If the impact lasted for 0.250s, what force (magnitude and direction) did Alex exert on the soccer ball? b. What is one thing that she could do to make the soccer ball have a larger change in momentum?

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SERCP11 6.2.P.030. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three ice skaters meet at the center of a rink and each stands at rest facing the center, within arm's reach of the other two. On a signal, each skater pushes himself away from the other two across the frictionless ice. After the push, skater A with mass m, = 75.0 kg moves in the negative y-direction at 2.50 m/s and skater B with mass m. = 90.0 kg moves in the negative x-direction at 2.00 m/s. Find the x- and y-components of the 80.0 kg skater C's velocity (in m/s) after the push. HINT m/s m/s Need Help? Watch It

An 61 kg fullback moving East with a speed of 7.9 m/s is tackled by a 86 kg opponent running West at 3.4 m/s, and the collision is perfectly inelastic. a.Calculate the magnitude of the velocity of the players just after the tackle and the direction b.Calculate the magnitude of the decrease in kinetic energy during the collision

9. You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass is 65.9 kg, and the sleds mass is 24.0 kg. The sled is moving by itself on the ice at 3.77 m/s. You parachute vertically down onto the sled, and land gently. What is the sleds velocity with you now on it?      0.30 m/s      1.52 m/s      1.27 m/s      1.01 m/s

8. You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass is 3.3 kg, and the sleds mass is 10.1 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 5.48 m/s. What will be your speed on the ice after jumping off?      0.38 m/s      1.22 m/s      0.99 m/s      0.76 m/s

A 0.400 kg hammer is moving horizontally at 4.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact in seconds.   s (b) What was the average force in newtons exerted on the nail?   N

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Jacob, a professional heavyweight boxer, delivers a forceful punch with his fist and arm, combining for an effective punching mass of 2.56 kg. His fist strikes a heavy bag at a velocity of 9.1 m/s and comes to a halt 10.9 ms after initial contact. Determine the magnitude of the average net force that Jacob exerts on the heavy bag. a. 2137 N b. 3569 N c. 5321 N d. 2757 Ne. 6112 N