35. A ball is thrown horizontally from the top of a 20-m high hill. It strikes the ground at an angle of 45°. With what speed was it thrown? Use g = 10 m/s. %3D
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- 1. A grasshopper leaps into the air from the edge of a vertical cliff, as shown in figure below. Find (a) the initial speed of the grasshopper and (b) the height of the cliff. sin50.0° =0.76, cos50.0° =0.64 6.74 cm 50.0⁰ Not to scale -1.06 m5.1. Two projectiles, both with a velocity of 50 m/s, are thrown from the same spot. One of them is thrown with an angle of 60 degrees, and the other one is thrown with an angle of 45 degrees. However, they both land on the same spot on top of a brick wall. How high is the brick wall?
- 24. A shell is fired with a horizontal velocity in the positive x direction at a speed of 330 m/s from the top of an 80- m high cliff. The shell strikes the ground 1330 m from the base of the cliff. What is the magnitude of the velocity of the shell as it hits the ground? Hint: you need to determine horizontal and vertical components of the final velocity first, from the kinematic equations, then calculate magnitude of the velocity. While the horizontal velocity remains constant, the vertical velocity does not. You will need time of flight to determine the latter. 80 m 1330 m A) 4.0 m/s B) 9.8 m/s B) 9.8 m/s C) 82 m/s D) 170 m/s (E) 332 m/s8. The hole on a level, elevated golf green is a horizontal distance of 145 m from the tee and at an elevation of 12.3 m above the tee. A golfer hits a ball at an angle of 8.7° above the horizontal and makes a hole-in-one! What was the initial speed of the ball? m/s 60 ssf60 * ssf60 ssfondle ssf60 sste ƒ60 ssf60*** 09JssA golfer goes to chip the ball. The closest edge of the green is 60 m away and the furthest edge of the green is 80 m away. He hits the ball with an initial velocity of 30 m/s at a 40 degree angle. With this range, will the ball land on the green? O a. Yes O b. No
- 2. A football kicker is attempting to make a 190 ft field goal. If the launch angle of the football is 35°, what is the minimum initial speed u which will allow the kicker to succeed? NOT allowed to use Chegg or other such websites. 12 ft 9. 190 ft e Type here to search LOUC Lenovo F11 Esc AI F9 F10 F5 F6 F7 F8 F3 F4 ol1. A ball is thrown upwards with an initial velocity of ; = 44 m/s at an angle of above the horizontal. It travels a distance Ar = 75 m in the horizontal direction and lands at its original height. What is 0? (Hint 1: examine the ball's motion in both the x and y directions. Hint 2: you may need to use that sin(0) cos(0) = (1/2) sin(20). Hint 3: There are two solutions to this problem; try to find both.) Take g = 9.81 m/s² and show all your work.9: An archer fires an arrow straight up into the air with a speed v0=35.6m/s. Neglect air resistance. a. Find the maximum height, hℎ, in meters, reached by the arrow. b. In terms of known quantities, write an expression for the time the arrow is in the air until it returns to launch height.
- 15. Three balls are thrown in the air. Ball A is thrown at an angle of 70°, ball B at 45° and ball C at 30°. The highest point reached by each ball is the same. Which of the following is true? ©Rutgers University 2021 Na. Ball A must go the farthest distance. Ball A must have the highest in initial speed. С. All must hit the ground at the same time. d All must hit the ground with the same speed. e. All balls must go the same distance.Gloria kicks a soccer ball so that it has an initial velocity15.8... Gloria kicks a soccer ball so that it has an initial velocity 15.8 meters per second at an angle of 28.0 degrees above the ground. What is the vertical component of the initial velocity? Choose one answer. -7.42 m/s 7.42 m/s -14.0 m/s 14.0 m/s3. A baseball player throws a 145g ball toward home-plate from the out-field. The throw was made at 30.0m/s, 30.0° above horizontal [South]. If the baseball player releases the ball 2.45m above the ground; a. Determine the velocity (speed and direction) at the moment the ball strikes the 'turf (ground). b. Determine the time at which the ball possessed a minimal amount of kinetic c. Determine minimum level of kinetic energy for the ball throughout its flight. | energy.