Answer:
3.974 Joule
Explanation:
Diameter of ring = 7.7 cm
a = Distance from the center = d/2 = 3.85 cm = 0.0385 m
Q = Charge = 5 mC
q = Charge to move = 3.4 mC
k = Coulomb constant = 9×10⁹ Nm²/C²
Work done will be equal to Potential energy when mass is at center
∴ Work to move a tiny 3.4 mC charge from very far away to the center of the ring is 3.974 Joule
<u>Answer:</u>
After 3 hours Amanda catch up to Ben.
<u>Explanation:</u>
Speed of Ben = 4 mi/h
Speed of Amanda = 6 mi/h
Time after Amanda starts after Ben leaves = 1.5 hours.
Let the time taken for them to catch up be t hours.
Distance traveled by Ben in time (t+1.5) = 4*(t+1.5)
Distance traveled by Amanda in time t = 6*t
Equating both the distances
4*(t+1.5)= 6*t
2t = 6
t = 3 hours
So after 3 hours Amanda catch up to Ben.
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