You are standing still on a bathroom scale. The scale shows your weight 140 lbs. How much is the support force?   A. ZERO   B. 140 x 9.8 m/s^2   C. 140N   D. 140 lbs

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Chapter7: Rotational Motion And Gravitation
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  1. You are standing still on a bathroom scale. The scale shows your weight 140 lbs. How much is the support force?

      A.

    ZERO

      B.

    140 x 9.8 m/s^2

      C.

    140N

      D.

    140 lbs

    Then

    1. choose all that apply to centripetal force.

        A.

      Gravitational and electrical forces can produce centripetal forces.

        B.

      Centripetal force depends on tangential spreed and radius of curvature .

        C.

      twice the radius needs half the centripetal force.

        D.

      Measured in the units of N or kg m/s^2

        E.

      Any type of force directed towards a fixed center.

        F.

      Twice the speed needs four times the centripetal force.

        G.

      Centripetal force depends on the mass, tangential speed and radius of the curvature.

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