COEFFICIENT OF RESTITUTION
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Work, Energy and Power

268870 A neutron travelling with a velocity \(v\) and kinetic energy E collides perfectly elastically head on with the nucleus of an atom of mass number \(A\) at rest. The fraction of the total kinetic energy retained by the neutron is

1 \(\frac{A-1}{A+1}=\)
2 \(\frac{A+1}{A-1} \overbrace{}^{2}\)
3 \(\frac{\mathrm{A}-1}{\mathrm{~A}} \mathrm{H}^{2}\)
4 \(\square \frac{A+1}{A} \overbrace{}^{2}\)
Work, Energy and Power

268871 Two balls each of mass '\(m\) ' are moving with same velocity \(v\) on a smooth surface as shown in figure. If all collisions between the balls and balls with the wall are perfectly elastic, the possible number of collisions between the balls and wall together is \(\quad(2008 \mathrm{M})\)

1 1
2 2
3 3
4 Infinity
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Work, Energy and Power

268870 A neutron travelling with a velocity \(v\) and kinetic energy E collides perfectly elastically head on with the nucleus of an atom of mass number \(A\) at rest. The fraction of the total kinetic energy retained by the neutron is

1 \(\frac{A-1}{A+1}=\)
2 \(\frac{A+1}{A-1} \overbrace{}^{2}\)
3 \(\frac{\mathrm{A}-1}{\mathrm{~A}} \mathrm{H}^{2}\)
4 \(\square \frac{A+1}{A} \overbrace{}^{2}\)
Work, Energy and Power

268871 Two balls each of mass '\(m\) ' are moving with same velocity \(v\) on a smooth surface as shown in figure. If all collisions between the balls and balls with the wall are perfectly elastic, the possible number of collisions between the balls and wall together is \(\quad(2008 \mathrm{M})\)

1 1
2 2
3 3
4 Infinity
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