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Unformatted text preview: b. What is the runners instantaneous speed at 30 sec? c. What is the runners instantaneous velocity at 30 sec? d. Is the runner accelerating at any time? If so, when and what direction? 11. An athlete throws a javelin while running with a horizontal velocity of 20 m/s. The athlete throws the javelin with a velocity of 50 m/s (with respect to himself) at an angle of 30 degrees with respect to the ground. a. What is the true velocity of the javelin at the instant it leaves the athletes hand? b. What is the vertical and horizontal velocity of the javelin after 2 sec? c. What is the speed of the javelin at the instant it leaves the athletes hand? d. What is the speed of the javelin after 2 sec? x y...
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- Fall '08