Solved: Projectiles: Coming or Going Most projectiles

Chapter 4, Problem 90

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Projectiles: Coming or Going? Most projectiles continually move farther from the origin during their ight, but this is not the case if the launch angle is greater than . For example, the projectile shown in Figure 424 has a launch angle of 75.0and an initial speed of 10.1 m/s. During the portion of its motion shown in red, it is moving closer to the origin it is moving away on the blue portions. Calculate the distance from the origin to the projectile (a) at the start of the red portion, (b) at the end of the red portion, and (c) just before the projectile lands. Notice that the distance for part (b) is the smallest of the three.