2.31.Set Up:Assume your head accelerates upward 1.0 m in 0.25 s with constant acceleration. Let be upward.and Solve: (a)and (b)No, different parts of your body travel through different distances in the same time.Reflect:The shorter the time for you to stand up, the greater the acceleration.2.32.Set Up:Let be the direction the jet travels and take and Solve: (a)and (b)2.33.Set Up:Let be the direction the person travels. (stops),is negative since it is opposite to the direction of the motion.Solve:so Then gives Reflect:We could also find the initial speed:2.34.Set Up:Take the direction to be the direction of motion of the boulder.Solve: (a)Use the motion during the first second to find the acceleration. andand For the second second,and We can also solve for the location at starting at which agrees with 2.00 m in the first second and 6.00 m in the second second. The boulder speeds up so travels far-ther in each successive second.
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