American football and Initial Velocity Essay Example for Free

American foot orb and Initial Velocity Essay1. A rock music is thrown horizontally at a speed of from the edge of a cliff in altitude. How far from the base of the cliff will the stone peach the ground? 2. A toy truck moves off the edge of a table that is high and lands from the base of the table. a. How much time passed between the moment the railcar left the table and the moment it hit the floor? b. What was the horizontal speed of the car when it hit the ground? 3. A hawk in level flying above the ground drops the fish it caught.If the hawks horizontal speed is , how far ahead of the drop point will the fish land? 4. A pistol is fired horizontally toward a tar engage away, but at the similar height. The bullets velocity is . How long does it take the bullet to get to the target? How far below the target does the bullet hit? 5. A bird, traveling at , wants to hit a waiter below with his dropping (see image). In order to hit the waiter, the bird must release his droppin g some distance before he is directly overhead. What is this distance? 6.Joe Nedney of the San Francisco 49ers kicked a national terminal with an initial velocity of at an tilt of . a. How long is the ball in the air? Hint you may assume that the ball lands at same height as it starts at. b. What are the range and maximum height of the ball? 7. A racquetball thrown from the ground at an angle of and with a speed of lands exactly by and by on the top of a nearby building. Calculate the horizontal distance it travelled and the height of the building. 8. Donovan McNabb throws a football. He throws it with an initial velocity of at an angle of .How much time passes until the ball travels horizontally? What is the height of the ball after seconds? (Assume that, when thrown, the ball is above the ground. ) 9. Pablo Sandoval throws a baseball with a horizontal component of velocity of . After seconds, the ball is above the release point. Calculate the horizontal distance it has travele d by this time, its initial vertical component of velocity, and its initial angle of projection. Also, is the ball on the way up or the way down at this moment in time? 10.Barry Bonds hits a home run that lands in the stands at an altitude above its starting altitude. Assuming that the ball left the bat at an angle of from the horizontal, calculate how long the ball was in the air. 11. A golfer can drive a ball with an initial speed of . If the tee and the green are separated by , but are on the same level, at what angle should the ball be driven? (Hint you should use at some point. ) 12. How long will it take a bullet fired from a cliff at an initial velocity of , at an angle below the horizontal, to reach the ground below?13. A diver in Hawaii is jump outing off a cliff high, but she notices that there is an outcropping of rocks out at the base. So, she must clear a horizontal distance of during the dive in order to survive. Assuming the diver jumps horizontally, what is his/he r minimum push-off speed? 14. If Monte Ellis can jump high on Earth, how high can he jump on the moon assuming same initial velocity that he had on Earth (where gravity is that of Earths gravity)? 15. James Bond is trying to jump from a helicopter into a speeding Corvette to capture the bad guy.The car is going and the helicopter is flying completely horizontally at . The helicopter is above the car and behind the car. How long must James Bond wait to jump in order to safely make it into the car? 16. A field goal kicker lines up to kick a yard field goal. He kicks it with an initial velocity of at an angle of . The field goal posts are meters high. a. Does he make the field goal? b. What is the balls velocity and direction of motion just as it reaches the field goal post (i. e. , after it has traveled in the horizontal direction)? 17.In a football game a punter kicks the ball a horizontal distance of yards . On TV, they track the descend time, which reads seconds. From this informa tion, calculate the angle and speed at which the ball was kicked. (Note for non-football watchers the projectile starts and lands at the same height. It goes yards horizontally in a time of seconds) Answers to Selected Problems 1. 2. a. b. 3. 4. below target 5. . 6. a. . b. 7. 8. seconds, meters 9. on the way up 10. 11. 12. 13. 14. 15. seconds 16. a. yes b. degrees from horizontal 17. degrees.