assume no energy is dissipated for all. a) Consider a system containing a roller
ID: 2173182 • Letter: A
Question
assume no energy is dissipated for all.a) Consider a system containing a rollercoaster and the earth. Where is the rollercoaster when the potential energy of the system is maximum? Where is it when the kinetic energy is maximum?
b) Consider a weight attached to a spring. The spring has been stretched, and then released. The weight oscillates horizontally on a frictionless surface. Where is the weight when the potential energy of the system is maximum? Where is it when the kinetic energy is maximum?
c) Consider a weight hanging from a spring, oscillating vertically. The weight-spring-earth system experiences kinetic energy and two kinds of potential energy. What is the kinetic energy of this system at the very top of the oscillation? At the very bottom of the oscillation? Would the total potential energy (gravitational and spring) be greater at the very top of the oscillation or the very bottom of the oscillation, or would they be the same?
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Explanation / Answer
a) PE maximum at top and KE maximum at bottom b)PE maximum at extreme positions and KE maximum at mean position c) KE is minimum at every top and every bottom , Total PE at top is greater than at bottom
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