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A football is kicked 40 m. If the ball is in the air for 4 s, with what initial speed was it kicked?

A football is kicked 40 m. If the ball is in the air for 4 s, with what initial speed was it kicked?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Answer number # 11,12,13,14 please
11. A football is kicked 40 m. If the ball is in the air for 4 s, with what initial speed was it kicked? .. A plane is flying at an altitude of 8000 m at a speed of 250 m/s. At what hori- zontal distance ahead of its target must a water balloon be released to strike the target on the ground (neglecting air resistance)? 13. Suppose that Spud Webb, in moon attire, jumps a vertical distance of 8.0 m on the moon. Acceleration due to gravity there is 1.6 m/s².What is Spud's hang time? 14. Suppose that Spud makes the same jump from a horizontally-moving skate- board on the moon's surface. Is his hang time more, less, or the same?
Transcribed Image Text:11. A football is kicked 40 m. If the ball is in the air for 4 s, with what initial speed was it kicked? .. A plane is flying at an altitude of 8000 m at a speed of 250 m/s. At what hori- zontal distance ahead of its target must a water balloon be released to strike the target on the ground (neglecting air resistance)? 13. Suppose that Spud Webb, in moon attire, jumps a vertical distance of 8.0 m on the moon. Acceleration due to gravity there is 1.6 m/s².What is Spud's hang time? 14. Suppose that Spud makes the same jump from a horizontally-moving skate- board on the moon's surface. Is his hang time more, less, or the same?
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