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icle, it is moving directly away from the heavy particie with a speed of vi. a) What is the lighter particie's speed when it is xf avway from the heavy particie? (Consider the Newtonian Gravit particles. Ignore the effécts of external forces) oaches. One involves the Newton's Laws and the other involving Work-Energy theorem. solution, we will instead employ the Work-Energy theorem, more specifically, the Conservation of Energy Principle. le as object 1 and the heavy particle as object 2. e will take into account all of the energy of the two-charged particie system before and after traveling a certain distance as KE1+ KE2f - PENEwtonianf Velasticf + Velectricf = KE11 + KE2i + PENewtoniani* - Uelectrici ixed, before and after the motion of the lighter particle, it does not have any velocity, moreover, there is no spring in involved, so • Velectrict Velectrici (Equation 1) owing KE = m Gm,m2 PENewtonian Ualastic = kx?

icle, it is moving directly away from the heavy particie with a speed of vi. a) What is the lighter particie's speed when it is xf avway from the heavy particie? (Consider the Newtonian Gravit particles. Ignore the effécts of external forces) oaches. One involves the Newton's Laws and the other involving Work-Energy theorem. solution, we will instead employ the Work-Energy theorem, more specifically, the Conservation of Energy Principle. le as object 1 and the heavy particle as object 2. e will take into account all of the energy of the two-charged particie system before and after traveling a certain distance as KE1+ KE2f - PENEwtonianf Velasticf + Velectricf = KE11 + KE2i + PENewtoniani* - Uelectrici ixed, before and after the motion of the lighter particle, it does not have any velocity, moreover, there is no spring in involved, so • Velectrict Velectrici (Equation 1) owing KE = m Gm,m2 PENewtonian Ualastic = kx?

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Problem A newly discovered light positively charged particle has a mass of m and charge q. Suppose it moves within the vicinity of an extremely heavy (fixed in place) particle with a positive charge Q and mass M. When the light particle is xi distance from the heavy particle, it is moving directly away from the heavy particle with a speed of vi. a) What is the lighter particle's speed when it is xf away from the heavy particle? (Consider the Newtonian Gravitation acting between the two charged particles. Ignore the effects of external forces) Solution: We may solve this using two approaches. One involves the Newton's Laws and the other involving Work-Energy theorem. To avoid the complexity of vector solution, we will instead employ the Work-Energy theorem, more specifically, the Conservation of Energy Principle. Let us first name the lighter particle as object 1 and the heavy particle as object 2. Through work-energy theorem, we will take into account all of the energy of the two-charged particle system before and after traveling a certain distance as KE1f + KE2F + PENewtonianf + Velasticf + Velectricf = KE1 + KE2i + PENewtoniani + - Uelectrici Since the heavy particle remains fixed, before and after the motion of the lighter particle, it does not have any velocity, moreover, there is no spring in involved, so KE11* + Uelectricf = Uelectrici (Equation 1) For all energies, we know the following KE = Gm,m2 PENewtonion = - 1 Uelastic = -kx² Uelectric = (1/ where in we have m1 = m, m2 = M, q1 = q and 92 = Q By substituting all these to Equation 1 and then simplifying results to = sqrt( 2 +( ( Q m ) - ) - (1/x ) ) + Take note that capital letters have different meaning than small letter variables/constants.
Transcribed Image Text:Problem A newly discovered light positively charged particle has a mass of m and charge q. Suppose it moves within the vicinity of an extremely heavy (fixed in place) particle with a positive charge Q and mass M. When the light particle is xi distance from the heavy particle, it is moving directly away from the heavy particle with a speed of vi. a) What is the lighter particle's speed when it is xf away from the heavy particle? (Consider the Newtonian Gravitation acting between the two charged particles. Ignore the effects of external forces) Solution: We may solve this using two approaches. One involves the Newton's Laws and the other involving Work-Energy theorem. To avoid the complexity of vector solution, we will instead employ the Work-Energy theorem, more specifically, the Conservation of Energy Principle. Let us first name the lighter particle as object 1 and the heavy particle as object 2. Through work-energy theorem, we will take into account all of the energy of the two-charged particle system before and after traveling a certain distance as KE1f + KE2F + PENewtonianf + Velasticf + Velectricf = KE1 + KE2i + PENewtoniani + - Uelectrici Since the heavy particle remains fixed, before and after the motion of the lighter particle, it does not have any velocity, moreover, there is no spring in involved, so KE11* + Uelectricf = Uelectrici (Equation 1) For all energies, we know the following KE = Gm,m2 PENewtonion = - 1 Uelastic = -kx² Uelectric = (1/ where in we have m1 = m, m2 = M, q1 = q and 92 = Q By substituting all these to Equation 1 and then simplifying results to = sqrt( 2 +( ( Q m ) - ) - (1/x ) ) + Take note that capital letters have different meaning than small letter variables/constants.
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