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In dealing with motion of projectile in ...

In dealing with motion of projectile in air, we ignore effect of air resistance on motion. This gives trajectory as a parabola as you have studied. What would the trajectory look like it air resistance is included . Sketch such a trajectory and explain why you have drawn it that way.

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Due to air resistance, the total energy of paricle as well as its horizontal component veloity will go on decreasing with time, making the fall of projectile steeper than its rise, as shown in Fig. 2 (EP).21 by thick solid curve.
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