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Honors - Projectile Motion: Homework 4. A machine launches a tennis ball at an angle of 252 above the horizontal at a speed of 14 m/s. The ball returns to level ground. Which combination of changes must produce an increase in time of flight of a second launch? a) O increase the launch angle and decrease the ball's initial c) . decrease the launch angle and increase the ball's initial speed speed b) @ increase the launch angle and increase the ball's initial d) . decrease the launch angle and decrease the ball's initial speed speed 6. Two spheres, A and B, are simultaneously projected horizontally from the top of a tower. Sphere A has a horizontal speed of 40. m/'s and sphere B has a horizontal speed of 20. m/s. Which statement best describes the time required for the spheres to reach the ground and the horizontal distance they travel? [Neglect friction and assume the ground is level.] a) O Sphere A hits the ground b) . Both spheres hit the c) . Both spheres hit the d) . Both spheres hit the before sphere B, and sphere A ground at the same time, but ground at the same time and atground at the same time, but lands twice as far as sphere B sphere B lands twice as far as the same distance from the sphere A lands twice as far as from the base of the tower. sphere A from the base of the base of the tower. sphere B from the base of the tower. tower. 1. (Honors) A projectile is launched from the ground with an initial velocity Vo at an angle 0 above the horizontal. How long will the projectile remain in air? A) (Vo sine)/g B) (2Vo sine)/g 8/(8500 ON) 67 D) (2Vo sine)/g E) (Vo tane)/g 2. An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.95 m/s. The rock falls through a vertical distance of 1.4 meters and lands a horizontal distance of 8.75 meters from the astronaut. What is the acceleration of gravity on Zircon? 3. (Honors) In a friendly soccer game, you hit a ball with a speed of 13 m/s at an angle of 24 degrees above the horizontal. (A) How long does it take for the ball to reach the goal if it is 4.2 meters away? (B) How high is the ball when it reaches the goal? 4. A golf ball is struck with a five iron on ground level. It lands 92.2m away 4.3 seconds later. What was the angle and magnitude of the initial velocity