Physics_A_Module_6_Exam_answers - Arizona State University PHY MISC

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1) Explain why a car with a greater mass would need brakes that can exert a greater braking force in order to operate safely. A heavier object has higher momentum and higher kinetic energy, which ar... e both dependent on the mass of a moving object. In order to reduce the speed of a moving object energy is required. The energy required is the sum of its kinetic energy, potential energy and momentum energy. 2) In order to move some heavy machinery onto a stage, Kevin sets up a ramp. The ramp allows him to move a 510 N piece of sound-equipment with a force of 165 N. What is the mechanical advantage of the ramp Kevin set up? A 1.0 B 4.5 C 0.32 D 3.1 3) Joshua is pushing a set piece for the school play onto the stage. If he applies a 95 N force for a period of 1.3 seconds, how much will the set piece's momentum change during that period? A 440 kg*m/s B 73 kg*m/s C 54 kg*m/s D 120 kg*m/s 4)Two skydivers are in free fall. One skydiver is moving towards the other. When they collide, they link arms, and travel downward as a single unit. Why type of collision is this? A Recoil collision B Elastic collision C This is not a collision D Inelastic collision 5) A 72 kg runner is traveling south at a speed of 5.1 m/s. What is the runner's momentum? A 310 kg*m/s B 26 kg*m/s C 14 kg*m/s D 370 kg*m/s 6) Clementine is spinning a merry-go-round. When she pulls on the handle, her force is perpendicular to the radius of the ride. If she pulls with a force of 44 N, and the radius of the merry-go-round is 1.7 m, how much torque did Clementine exert on the ride? [Show More]

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