Concept explainers
A glass sphere with radius 4.00 mm, mass 85.0 g, and total charge 4.00 μC is separated by 150.0 cm from a second glass sphere 2.00 mm in radius, with mass 300.0 g and total charge −5.00 μC. The charge distribution on both spheres is uniform. If the spheres are released from rest, what is the speed of each sphere the instant before they collide?
The speed of each sphere the instant before they collide.
Answer to Problem 63PQ
The speed of first sphere the instant before collision is
Explanation of Solution
Write an expression for the conservation of momentum of teh spheres.
Here,
Rewrite the expression to find
Write an expression for conservation of energy of the spheres.
Here,
Rearrange equation (III) to find
Substitute equation (II) in equation (IV).
Conclusion:
Substitute
Substitute
Thus, the speed of first sphere the instant before collision is
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Chapter 26 Solutions
Physics for Scientist and Engineers (Foundations And Connection; Volume I and II) LLF edition
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