Unformatted text preview: b. What is the runner’s instantaneous speed at 30 sec? c. What is the runner’s 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 athlete’s 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 athlete’s hand? d. What is the speed of the javelin after 2 sec? x y...
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 Fall '08
 JUDKINS
 Scalar, Acceleration, Speed of sound, Velocity

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