I believe it's the law of Inertia, I learned this in 8th grade, but that was a while ago. I do believe it's the law of Inertia though.
Answer: C. (Force = 2, time = 4.5)
Explanation:
J = FΔt
A. J = 5*2
A. J = 10
B. J = 1*8.5
B. J = 8.5
C. J = 2*4.5
C. J = 9
D. J = 3*2
D. J = 6
Since two identical bulbs are connected in this circuit in series combination
So here same current will flow into the circuit
So here we can say
also we know that
also it is given that bulbs are identical so we have
as we have
so now we can say
so here voltage across C and D is 1.5 volts