COLLISIONS
Work, Energy and Power

268681 A marble going at a speed of \(2 \mathrm{~ms}^{-1}\) hits another marble of equal mass at rest. If the collision is perfectly elastic, then the velocity of the first marble after collision is

1 \(4 \mathrm{~ms}^{-1}\)
2 \(0 \mathrm{~ms}^{-1}\)
3 \(2 \mathrm{~ms}^{-1}\)
4 \(3 \mathrm{~ms}^{-1}\)
Work, Energy and Power

268682 A massive ball moving with a speed \(v\) collides head on with a fine ball having mass very much smaller than the mass of the first ball at rest. The collision is elastic and then immediately after the impact, the second ball will move with a speed approximately equal to

1 \(v\)
2 \(2 v\)
3 \(v / 3\)
4 infinite
Work, Energy and Power

268683 A \(1 \mathrm{~kg}\) ball moving at \(12 \mathrm{~m} / \mathrm{s}\) collides head on with a \(2 \mathrm{~kg}\) ball moving in the opposite direction at \(24 \mathrm{~m} / \mathrm{s}\). The velocity of each ball after the impact, if the coefficient of restitution is \(2 / 3\) is

1 \(-28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
2 \(28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
3 \(20 \mathrm{~m} / \mathrm{s} ; 24 \mathrm{~m} / \mathrm{s}\)
4 \(-20 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
Work, Energy and Power

268684 A \(6 \mathrm{~kg}\) mass collides with a body at rest. After the collision, they travel together with a velocity one third the velocity of \(6 \mathrm{~kg}\) mass. The mass of the second body is

1 \(6 \mathrm{~kg}\)
2 \(3 \mathrm{~kg}\)
3 \(12 \mathrm{~kg}\)
4 \(18 \mathrm{~kg}\)
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Work, Energy and Power

268681 A marble going at a speed of \(2 \mathrm{~ms}^{-1}\) hits another marble of equal mass at rest. If the collision is perfectly elastic, then the velocity of the first marble after collision is

1 \(4 \mathrm{~ms}^{-1}\)
2 \(0 \mathrm{~ms}^{-1}\)
3 \(2 \mathrm{~ms}^{-1}\)
4 \(3 \mathrm{~ms}^{-1}\)
Work, Energy and Power

268682 A massive ball moving with a speed \(v\) collides head on with a fine ball having mass very much smaller than the mass of the first ball at rest. The collision is elastic and then immediately after the impact, the second ball will move with a speed approximately equal to

1 \(v\)
2 \(2 v\)
3 \(v / 3\)
4 infinite
Work, Energy and Power

268683 A \(1 \mathrm{~kg}\) ball moving at \(12 \mathrm{~m} / \mathrm{s}\) collides head on with a \(2 \mathrm{~kg}\) ball moving in the opposite direction at \(24 \mathrm{~m} / \mathrm{s}\). The velocity of each ball after the impact, if the coefficient of restitution is \(2 / 3\) is

1 \(-28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
2 \(28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
3 \(20 \mathrm{~m} / \mathrm{s} ; 24 \mathrm{~m} / \mathrm{s}\)
4 \(-20 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
Work, Energy and Power

268684 A \(6 \mathrm{~kg}\) mass collides with a body at rest. After the collision, they travel together with a velocity one third the velocity of \(6 \mathrm{~kg}\) mass. The mass of the second body is

1 \(6 \mathrm{~kg}\)
2 \(3 \mathrm{~kg}\)
3 \(12 \mathrm{~kg}\)
4 \(18 \mathrm{~kg}\)
Work, Energy and Power

268681 A marble going at a speed of \(2 \mathrm{~ms}^{-1}\) hits another marble of equal mass at rest. If the collision is perfectly elastic, then the velocity of the first marble after collision is

1 \(4 \mathrm{~ms}^{-1}\)
2 \(0 \mathrm{~ms}^{-1}\)
3 \(2 \mathrm{~ms}^{-1}\)
4 \(3 \mathrm{~ms}^{-1}\)
Work, Energy and Power

268682 A massive ball moving with a speed \(v\) collides head on with a fine ball having mass very much smaller than the mass of the first ball at rest. The collision is elastic and then immediately after the impact, the second ball will move with a speed approximately equal to

1 \(v\)
2 \(2 v\)
3 \(v / 3\)
4 infinite
Work, Energy and Power

268683 A \(1 \mathrm{~kg}\) ball moving at \(12 \mathrm{~m} / \mathrm{s}\) collides head on with a \(2 \mathrm{~kg}\) ball moving in the opposite direction at \(24 \mathrm{~m} / \mathrm{s}\). The velocity of each ball after the impact, if the coefficient of restitution is \(2 / 3\) is

1 \(-28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
2 \(28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
3 \(20 \mathrm{~m} / \mathrm{s} ; 24 \mathrm{~m} / \mathrm{s}\)
4 \(-20 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
Work, Energy and Power

268684 A \(6 \mathrm{~kg}\) mass collides with a body at rest. After the collision, they travel together with a velocity one third the velocity of \(6 \mathrm{~kg}\) mass. The mass of the second body is

1 \(6 \mathrm{~kg}\)
2 \(3 \mathrm{~kg}\)
3 \(12 \mathrm{~kg}\)
4 \(18 \mathrm{~kg}\)
Work, Energy and Power

268681 A marble going at a speed of \(2 \mathrm{~ms}^{-1}\) hits another marble of equal mass at rest. If the collision is perfectly elastic, then the velocity of the first marble after collision is

1 \(4 \mathrm{~ms}^{-1}\)
2 \(0 \mathrm{~ms}^{-1}\)
3 \(2 \mathrm{~ms}^{-1}\)
4 \(3 \mathrm{~ms}^{-1}\)
Work, Energy and Power

268682 A massive ball moving with a speed \(v\) collides head on with a fine ball having mass very much smaller than the mass of the first ball at rest. The collision is elastic and then immediately after the impact, the second ball will move with a speed approximately equal to

1 \(v\)
2 \(2 v\)
3 \(v / 3\)
4 infinite
Work, Energy and Power

268683 A \(1 \mathrm{~kg}\) ball moving at \(12 \mathrm{~m} / \mathrm{s}\) collides head on with a \(2 \mathrm{~kg}\) ball moving in the opposite direction at \(24 \mathrm{~m} / \mathrm{s}\). The velocity of each ball after the impact, if the coefficient of restitution is \(2 / 3\) is

1 \(-28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
2 \(28 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
3 \(20 \mathrm{~m} / \mathrm{s} ; 24 \mathrm{~m} / \mathrm{s}\)
4 \(-20 \mathrm{~m} / \mathrm{s} ;-4 \mathrm{~m} / \mathrm{s}\)
Work, Energy and Power

268684 A \(6 \mathrm{~kg}\) mass collides with a body at rest. After the collision, they travel together with a velocity one third the velocity of \(6 \mathrm{~kg}\) mass. The mass of the second body is

1 \(6 \mathrm{~kg}\)
2 \(3 \mathrm{~kg}\)
3 \(12 \mathrm{~kg}\)
4 \(18 \mathrm{~kg}\)