D=vt
V=d/t
V=2,172 mi / 39.5 h
V=54.987 mi/h
Answer:

where E = electric field intensity
Explanation:
As we know that plastic ball is suspended by a string which makes 30 degree angle with the vertical
So here force due to electrostatic force on the charged ball is in horizontal direction along the direction of electric field
while weight of the ball is vertically downwards
so here we have


since string makes 30 degree angle with the vertical so we will have





where E = electric field intensity
Fluid ounces measure in volume
<span>We can use the equation for the force of gravity to solve this question.
F = G M1 M2 / R^2
Let R be the radius of the planet.
f0 = G M1 M2 / (2R)^2
f0 = (1/4) x (G M1 M2 / R^2)
We can find an expression for f2.
f2 = G M1 M2 / (4R)^2
f2 = (1/16) x (G M1 M2 / R^2)
We can express f2 in terms of f0:
f2 = (4/16) x f0
f2 = 0.25 f0</span>