Questiorn Be sure to answer all parts. Calculate the velocity (in m/s) of a 0.37

Question

Questiorn Be sure to answer all parts. Calculate the velocity (in m/s) of a 0.376-g object that has Ek = 15.5 J. m/s Determine which of the following pairs of charged particles has the greater electrostatic energy between them: charges of +1 and -2 separated by a distance of or charges of +2 and -2 separated by a distance of . Select the single best answer. O A. charges of +1 and-2 separated by a distance of d have greater energy O B. charges of +2 and -2 separated by a distance of 2d have greater energy C. both pairs have equal energy

Explanation / Answer

Kinetic energy = 0.5 * m * V^2

m = 0.376 * 10^-3 Kg

15.5 = 0.5 * 0.376*10^-3 * V^2

287.13 meter per sec = V

B) energy is proportional to product of charge and inversely proportional to distance.

For first case

Product of charge / distance =( +1*-2)/ d = -2/d

For second case = (+2*-2)/2d = -2/d

Hence same for both cases

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