What is the energy of this system? Express your answer using two significant fig

Question

What is the energy of this system? Express your answer using two significant figures. Two small metal cubes with masses 2.0 g and 4.0 g are tied together by a 4.8-cm-long massless string and are at rest on a frictionless surface. Each is charged to +1.5 C Emech Submit My Answers Give Up Part B What is the tension in the string? Express your answer using two significant figures Submit My Answers Give Up Part C The string is cut. What is the speed of each sphere when they are far apart? Hint: There are two conserved quantities. Make use of both. Express your answers using two significant figures. Enter your answers numerically separated by a comma.

Explanation / Answer

a)energy = 9*10^9 * 1.5*1.5*10^-12/(0.048) = 0.4218 J

b)T = 9*10^9 *1.5*1.5*10^-12/(0.048)^2 =8.78N

c)2*v1 + 4v2 =0
v1=-2v2
0.4218 = 0.5*0.002*v1^2 + 0.5*0.004*v2^2
solving v1 and v2

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