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Lena [83]
3 years ago
10

30N of force is used to raise a box that weight 60N up an incline plane. What is the mechanical advantage of the incline plane?

Physics
1 answer:
Sati [7]3 years ago
3 0
To calculate MA = force needed/force used
Example
MA = 60/30 = 2
The mechanical advantage is 2
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p = 1.16 10⁻¹⁴ C m     and  ΔU = 2.7 10 -11 J

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                        p = 1.7 10⁻⁹ 6.8 10⁻⁶

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The potential energie dipole  is described by the expression

                       U = - p E cos θ

Where θ is the angle between the dipole and the electric field, the zero value of the potential energy is located for when the dipole is perpendicular to the electric field line

Orientation parallel to the field

                      θ = 0º

                      U = 1.16 10⁻¹⁴ 1160 cos 0

                      U1 = 1.35 10⁻¹¹ J

Antiparallel orientation

                       θ = 180º

                      cos 180 = -1

                      U2 = -1.35 10⁻¹¹ J

The difference in energy between these two configurations is the subtraction of the energies

                         ΔU = | U1 -U2 |

                         ΔU = 1.35 10-11 - (-1.35 10-11)

                         ΔU = 2.7 10 -11 J

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