HRWP37p192
For part a, you need to know the initial kinetic energy so that you can compare it to the potential energy graph. If there is left over energy at 1 m (delta U - KE > 0) then that energy is kinetic and you can derive the speed for x < 2 m.
For part b, the negative of the slope of the line is the force. The sign gives you the direction (magnitude is always positive).
Remember that U + KE = constant (since no non-conservative forces are present). KE = .5 mv2.
For part a, you need to know the initial kinetic energy so that you can compare it to the potential energy graph. If there is left over energy at 1 m (delta U - KE > 0) then that energy is kinetic and you can derive the speed for x < 2 m.
For part b, the negative of the slope of the line is the force. The sign gives you the direction (magnitude is always positive).
Remember that U + KE = constant (since no non-conservative forces are present). KE = .5 mv2.
posted by Dr9pt8 at 10:22 PM
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