Recent content by gunster

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    Conservation of energy and string pulley problem

    wow I see the moment of inertia is given in grams. Thank you so much that would explain why I failed XD
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    Conservation of energy and string pulley problem

    Homework Statement Consider two masses of 3.3 kg and 7.4 kg connected by a string passing over a pulley having a moment of inertia 12 g · m2 about its axis of rotation, as in the figure below. The string does not slip on the pulley, and the system is released from rest. The radius of the...
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    Finding Force in Potential Energy vs. Interatomic Distance graph

    Homework Statement The figure below shows a graph of potential energy versus interatomic distance for a particular molecule. Rank the magnitude of the force at locations A, B, and C. (That is, which is the greatest, which is smallest, and are any of these equal to each other?)...
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    Estimating Heart Power Output for Humans Standing/Lying Down

    Homework Statement Humans have about v = 60 cm3 of blood per kilogram of body mass and blood makes a complete circuit in t = 20 s seconds. For a human body of thickness 0.2 m and height 1.8 m, estimate the change in power output of the heart when the body is standing up on a horizontal...
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    Work done to move spring displacement

    EDIT: nvm realized my mistake was suppose to subtract Thanks a lot for reminding me force is not constant XD
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    Work done to move spring displacement

    Homework Statement A spring has a relaxed length of 5 cm and a stiffness of 95 N/m. How much work must you do to change its length from 2 cm to 10 cm? k=95 Lnull=0.05 delta x = .1-.02 = 0.08 Homework Equations F=-kx W=Fdcostheta The Attempt at a Solution I honestly have...