268877 A particle of mass \(2 \mathrm{~kg}\) starts moving in a straight line with an initial velocity of \(2 \mathrm{~m} / \mathrm{s}\) at a constant acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\). Then rate of change of kinetic energy

268878 A running man has half the kinetic energy that a running boy of half his mass has. The man speeds up by \(1.0 \mathrm{~m} / \mathrm{s}\) and now has the same kinetic energy as the boy. The original speed of the man expressed in \(\mathrm{m} / \mathrm{s}\) units must be

268879 The kinetic energy (KE) versus time graph for a particle moving along a straight line is shown in the figure. The force vs time graph for the particle may be

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268877 A particle of mass \(2 \mathrm{~kg}\) starts moving in a straight line with an initial velocity of \(2 \mathrm{~m} / \mathrm{s}\) at a constant acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\). Then rate of change of kinetic energy

268878 A running man has half the kinetic energy that a running boy of half his mass has. The man speeds up by \(1.0 \mathrm{~m} / \mathrm{s}\) and now has the same kinetic energy as the boy. The original speed of the man expressed in \(\mathrm{m} / \mathrm{s}\) units must be

268879 The kinetic energy (KE) versus time graph for a particle moving along a straight line is shown in the figure. The force vs time graph for the particle may be

1 

2 

3

4 

268877 A particle of mass \(2 \mathrm{~kg}\) starts moving in a straight line with an initial velocity of \(2 \mathrm{~m} / \mathrm{s}\) at a constant acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\). Then rate of change of kinetic energy

268878 A running man has half the kinetic energy that a running boy of half his mass has. The man speeds up by \(1.0 \mathrm{~m} / \mathrm{s}\) and now has the same kinetic energy as the boy. The original speed of the man expressed in \(\mathrm{m} / \mathrm{s}\) units must be

268879 The kinetic energy (KE) versus time graph for a particle moving along a straight line is shown in the figure. The force vs time graph for the particle may be

1 

2 

3

4