Physics
Physics, 13.03.2020 16:37, mamas12345

Sassbot and Block Ness Monster play roller derby for the Reservoir Dolls, a roller derby team in Madison, Wisconsin. In a particular bout against the Unholy Rollers, another Madison team, Sassbot is playing the position of jammer: she must pass members of the Unholy Rollers in order to score points. Block Ness Monster is playing as a blocker: she must help Sassbot while also stopping the Unholy Rollersā€™ jammer. During a crucial moment in the bout, Monster sees that Sass, a few feet in front of her, is about to get hit by Skullz B. Kraken, a member of the Unholy Rollers. Monster reaches Sass quickly and pushes her forward, attempting to give Sass a boost of speed so she is out of the Skullzā€™s reach. Monster pushes Sass straight forward, delivering the push at Sassā€™s center of mass, her lower back, so that Sass does not experience any rotation due to the push. Neither Monster nor Sass are using their wheels to brake immediately before, during, or after the push, so the outside forces on them are negligible. Monsterā€™s mass is 82 kg. Sassā€™s mass is 55 kg. Monsterā€™s speed before the push is 2 mĀ·sāˆ’1, and Sassā€™s speed before the push is 0.75 mĀ·sāˆ’1. Monster and Sass have found, in previous practice, that the average coefficient of restitution of this sort of push between them is 0.8. The coefficient of restitution is defined as the ratio of the difference in two objectsā€™ velocities after the collision to that of the difference in the objectsā€™ velocities before the collision. e = v2,f āˆ’ v1,fv2,i āˆ’ v1,i At the moment Monster finishes her push, Skullz is 0.75 m to the left and 1.1 m in front of Sass. Skullz is moving laterally (to the right) at a speed of 2.15 mĀ·sāˆ’1 in her attempt to hit Sass. Sass is moving directly forward after Monsterā€™s push. Will Sass get hit by Skullz or will she get past her in time?

How long will it take Sass to travel forward past Skullzā€™s position?

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Answers: 3

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Sassbot and Block Ness Monster play roller derby for the Reservoir Dolls, a roller derby team in Mad...

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