Lesson_3.5_Homework

Lesson_3.5_Homework - Lesson 14 Home work 1 When tossed...

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Lesson 14 Home work 1. When tossed upward and hit horizontally by a batter, a 0.32 kg ball receives an impulse of 5.0 Ns. With what speed does the ball move away from the bat? 2. A basketball with a mass of 0.6 kg is thrown horizontally against a wall with a velocity of 20 ms -1 . If the ball rebounds with a velocity of 15 ms -1 , what is the impulse imparted to the ball? 3. A ball dropped from a height of 2.0 m rebounds to a height of 1.2 m after colliding with the floor. What is the coefficient of restitution between the floor and the ball? 4. A freight car with a mass of 4.0 × 10 4 kg rolls down an inclined track a vertical distance of 4.2 m. At the bottom of the incline, on a level track, it collides and couples with an identical freight car that was at rest. What percentage of the initial kinetic energy is lost in the collision? 5. A 1000-kg car traveling east at 72 kmh -1 and a 4000-kg SUV traveling south at 90 kmh -1 collide at a perpendicular intersection. Assuming a
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Lesson_3.5_Homework - Lesson 14 Home work 1 When tossed...

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