from farthest to the nearest
Neptune
Uranus
saturn
Jupiter
mars
earth
venus
mercury
Answer:
70 kg = 7e+7
Explanation:
multiply the mass value by 1e+6
Answer:
<em>not move as the forces have an equal strength acting at opposite directions, these forces cancel each other out, hence why the object cant move</em>
The electrostatic force of attraction or repulsion is can be found as follows,
let us consider 2 bodies in gravitational field of earth. Let the distance between those two bodies is equal to r meters. The charge on the first body is Q1 and charge on second body is Q2.
By columbs force, <u>F </u><u /><u>α Q1×Q2</u><u>
</u> r²
F=<u>k Q1×Q2 </u> where k-gravitational constant.
<u /> r²
Ask me, if you have any doubt regarding this.
Answer:
U = 1 / r²
Explanation:
In this exercise they do not ask for potential energy giving the expression of force, since these two quantities are related
F = - dU / dr
this derivative is a gradient, that is, a directional derivative, so we must have
dU = - F. dr
the esxresion for strength is
F = B / r³
let's replace
∫ dU = - ∫ B / r³ dr
in this case the force and the displacement are parallel, therefore the scalar product is reduced to the algebraic product
let's evaluate the integrals
U - Uo = -B (- / 2r² + 1 / 2r₀²)
To complete the calculation we must fix the energy at a point, in general the most common choice is to make the potential energy zero (Uo = 0) for when the distance is infinite (r = ∞)
U = B / 2r²
we substitute the value of B = 2
U = 1 / r²
