Physics

Problem

0.50\,\text{kg}

air-track glider moves along a straight line. At

t = 0\,\text{s}

its linear momentum is

1.0\,\text{kg·m/s}

in the

+x

direction. At

t = 4.0\,\text{s}

its momentum is

5.0\,\text{kg·m/s}

in the

+x

direction. Assume the momentum changes at a constant rate during the interval. a. Calculate the magnitude and direction of the net external force acting on the glider during the 4.0 s interval. b. Determine the glider’s acceleration during this interval. c. If the glider’s speed at

t = 0\,\text{s}

2.0\,\text{m/s}

, determine its speed at

t = 4.0\,\text{s}

. Show that your result is consistent with your answer to part (a).

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