I think Y is the answer to number 4
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A body is said to be in motion when it's position changes continuously with respect to a stationary object taken as reference point.
Answer:
Charges,
Explanation:
Given that,
Radius of the balls is 2 mm
The force of repulsion acting on the balls, F = 2.75 N
The separation between the spheres, d = 5.33 cm = 0.0533 m
The force of repulsion between charges is given by :






So, the charge on the spheres is
. Hence, this is the required solution.