1. George and May are moving a 90 kg sofa. George is pushing the couch with...

      

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1. George and May are moving a 90 kg sofa. George is pushing the couch with a force of 130 N due north, and May is pushing with a force of 180 N 30 degrees East of North. a. Assuming that the floor is slippery, and friction can be neglected, Find the Magnitude and direction of the acceleration of the couch b. If we have friction, what would be coefficient of kinetic friction if by applying that net force the sofa is moving at a constant speed? 5. Several shoe manufacturing companies use springs to support the heels on their shoes. When a 85 kg runner rocks back on his heels so that all of his weight is supported by the heel springs, the springs each compress by 1.5 mm. When he is running hard and hits the ground on one heel, the force compressing the spring is 5.0 times his weight. a. What is the spring constant k of a heel spring? b. By how much do the springs compress during a heel strike? 1. George and May are moving a 90 kg sofa. George is pushing the couch with a force of 130 N due north, and May is pushing with a force of 180 N 30 degrees East of North. a. Assuming that the floor is slippery, and friction can be neglected, Find the Magnitude and direction of the acceleration of the couch b. If we have friction, what would be coefficient of kinetic friction if by applying that net force the sofa is moving at a constant speed? 5. Several shoe manufacturing companies use springs to support the heels on their shoes. When a 85 kg runner rocks back on his heels so that all of his weight is supported by the heel springs, the springs each compress by 1.5 mm. When he is running hard and hits the ground on one heel, the force compressing the spring is 5.0 times his weight. a. What is the spring constant k of a heel spring? b. By how much do the springs compress during a heel strike?