Asolid nonconducting sphere of radius r carries a charge q distributed uniformly throughout its volume. at a certain distance r1 (r1 < r) from the center of the sphere, the electric field has magnitude e. if the same charge q were distributed uniformly throughout a sphere of radius 2r, the magnitude of the electric field at the same distance r1 from the center would be equal to:

Explanation:

As we know that that electric field inside the solid non conducting sphere is given as

so electric field is given as

now if another sphere has same charge but twice of radius then the electric field at same position is given as

so here we have

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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its c i just checked it