Recent content by cthionic

  1. C

    Calculate Magnitude of Force to Push 10 kg Object 11m, Speed 2 to 5.2 m/s

    Oops. I see my mistake, I was dividing 123 by 11, 143 J at 5.2m/s isn't correct, it's actually 135. Thanks.
  2. C

    Calculate Magnitude of Force to Push 10 kg Object 11m, Speed 2 to 5.2 m/s

    Homework Statement "A force was used to push a 10 kg object through a distance of 11 metres. Its speed was initially 2 m/s, and was increased to 5.2 m/s at the end of the 11 metres. What was the magnitude of the force?" Homework Equations Ek = 1/2 mv^2 W = fd? The Attempt at a...
  3. C

    Work done by pulling block over surface.

    I think so. If you kept pulling/pushing with the force you needed to get it started, you would be accelerating instead of keeping a constant low velocity, right?
  4. C

    Work done by pulling block over surface.

    Thanks! So I would take the weight of the block, 80, multiply that by gravity, 9.8, which would be the normal force. then, 9.8 * 80 * 0.2, which is 156.8, then multiplied by the distance, 1.25, and then i get 196 J. is this correct?
  5. C

    Work done by pulling block over surface.

    Homework Statement A 80-kg block is pulled across a rough surface a distance of 1.25 metres. How much work was done in moving it? The coefficient of static friction was 0.3 and kinetic friction was 0.2. Assume the velocities were very low. Homework Equations W = fd ?? The Attempt at...
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