A mass m hits a mass M at rest and stops just after the collision: coefficient of restitution

1. A.
   $\frac{m}{M}$
2. B.
   $\frac{M-m}{M+m}$
3. C.
   $1$
4. D.
   $\frac{m}{M+m}$

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1. A.
   $\frac{m}{M + m}$
2. B.
   $\frac{M - m}{M + m}$
3. C.
   $\frac{m}{M}$
4. D.
   1

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1. A.
   $0.5$
2. B.
   $0.4$
3. C.
   $0.6$
4. D.
   $0.8$

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