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 involved, so KE16 + + + Unewf = + + + Unewi + (Equation 1) For all energies, we know the following KE= Am,m2 PEgrav r Uelastic = Unew = (1/ /(r where in we have m1 = m, m2 = M, q1 = q and q2 = Q By substituting all these to Equation 1 and then simplifying results to sqrt( 2 + ( ( %3D V m ) - ) - (1/x Take note that capital letters have different meaning than small letter variables/constants.

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Chapter9: Relativity
Section9.7: Relativistic Energy
Problem 9.6QQ: The following pairs of energiesparticle 1: E, 2E; particle 2: E, 3E; particle 3: 2E, 4Erepresent the...
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One newly discovered light particle has a mass of m and property q. Suppose it moves within the vicinity of an extremely heavy (fixed in place) particle with a property 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?

 

Problem
One newly discovered light particle has a mass of m and
property q. Suppose it moves within the vicinity of an
extremely heavy (fixed in place) particle with a property 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 a new expression for gravitation potential energy as:
Am m2
PE grav =
where A is a constant, mj and m2 are the
masses of the two objects, and r is the distance between them.
Moreover, the new particle has an additional interaction with
the heavy particle through the following force expression
1
Fnew =
qQ
4περ r2
where ɛ, is a constant that is read as epsilon subscript 0, q
and Q are their new properties, r is the distance between the
new particle and the heavy particle.
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 + PEgravf + Uelasticf + Unewf = KE1 + KE2¡ +
PEgravi +
+ Unewi
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 involved, so
KE1F +
+
Transcribed Image Text:Problem One newly discovered light particle has a mass of m and property q. Suppose it moves within the vicinity of an extremely heavy (fixed in place) particle with a property 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 a new expression for gravitation potential energy as: Am m2 PE grav = where A is a constant, mj and m2 are the masses of the two objects, and r is the distance between them. Moreover, the new particle has an additional interaction with the heavy particle through the following force expression 1 Fnew = qQ 4περ r2 where ɛ, is a constant that is read as epsilon subscript 0, q and Q are their new properties, r is the distance between the new particle and the heavy particle. 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 + PEgravf + Uelasticf + Unewf = KE1 + KE2¡ + PEgravi + + Unewi 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 involved, so KE1F + +
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 involved, so
KE16 +
+
+
+ Unewf =
%3D
+
+
+ Unewi
+
(Equation 1)
For all energies, we know the following
KE=
Am¡m2
PEgrav
Uelastic =
Unew = (1/
%3D
where in we have
m1 = m, m2 = M, q1 = q and q2 = 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: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 involved, so KE16 + + + + Unewf = %3D + + + Unewi + (Equation 1) For all energies, we know the following KE= Am¡m2 PEgrav Uelastic = Unew = (1/ %3D where in we have m1 = m, m2 = M, q1 = q and q2 = 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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