Recent content by court2011

  1. C

    Current flows through the block of metal

    would the equation be (3.14)(a)(b2)/c
  2. C

    Current flows through the block of metal

    so it'll be I= pi a(b^2)/c?
  3. C

    Current flows through the block of metal

    Homework Statement Consider a rectangular block of metal of height A, width B, and length C, as shown in the figure below. If a potential difference V is maintained between the two A B faces of the block, a current IAB is observed to flow. Find the current that flows if the same potential...
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    Rotational kinetic energy and moment of inertia

    kk sweet thanks! i got it right :)
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    Rotational kinetic energy and moment of inertia

    ohhh so should i have 1/2mr^2
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    Rotational kinetic energy and moment of inertia

    Homework Statement A 16 g CD with a radius of 6.0 cm rotates with an angular speed of 42 rad/s. (a) What is its kinetic energy? Homework Equations k=1/2Iw^2 The Attempt at a Solution k=1/2(0.016x0.0036)(1764)=0.05 J
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    Inelastic Collision homework problem

    Homework Statement Two 75.0 kg hockey players skating at 6.15 m/s collide and stick together. If the angle between their initial directions was 130°, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of player 2 be at an angle of...
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    Conservation of Momentum homework help

    Homework Statement A 93 kg astronaut and a 1500 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.16 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. What...
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    Finding Force Constant of a Spring

    ma which is 1.8*1.95=3.51
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    Finding Force Constant of a Spring

    is Fr where i am supposed to insert the frictional force? because i did and I still got the problem wrong but equation seems right how do i find the frictional force isn't it fk=ukN?
  11. C

    Finding Force Constant of a Spring

    ok i need to find k so how do i get the potential energy without having k in the equation?
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    Finding Force Constant of a Spring

    ok so potential energy is = mgy but if its going horizontal isn't y=0 so the potential energy is 0?
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    Finding Force Constant of a Spring

    hi! the problem doesn't say so I am assuming i have to find it given the coefficient of kinetic friction?
  14. C

    Finding Force Constant of a Spring

    Homework Statement A 1.80 kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 1.95 m/s and compresses it a distance of 14.0 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is µk = 0.560, what is the force...