Projectile motion reviewer, Lecture notes of Engineering Dynamics

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22. Problem: A projectile is fired at the top of a 30-m building at an angle of 20° with A 206s B. 227s G 212s D 18.5s 22. Problem: A ball is thrown at an angle of 30° to the horizontal and lands on the top edge of a building 5 m high. If the building is 20 m away, determine the initial velocity of the ball? 19 m/s 20m/s —" 21 mis 22 m/s com> A baseball batter hits his home run ball with a velocity of 110 ft/s at an angle of 45° above the horizontal, If the ball hits the top of a screen at the 300 ft mark and bounces to the crowd, how high above the ground is the top of the screen? ‘ 24. Problem: . . From the top of a hill inclined at an angle of 30°, a projectile is fired with a velocity of 50 ft/s. If the projectile is positioned perpendicular to the surface of the hill, determine its range down the hill. 103.52 feet ——" A B. 104.65 feet C. 105.89 feet D. 106.70 feet 2H) -y> x4 ~ gx? apm" qn? 0057@ B=