For general projectile motion with no air resistance, the horizontal component of a projectile's velocity continuously increases. first decreases and then increases. O continuously decreases. remains a non-zero constant. remains zero.
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- A firefighter, a distance d from a burning building, directs a stream of water from a fire hose at angle i above the horizontal as shown in Figure P3.16. If the initial speed of the stream is vi, at what height h does the water strike the building? Figure P3.16"Which is an accurate statement for general projectile motion, when the projectile is at the highest point of its trajectory?" Its acceleration is zero. Its velocity is perpendicular to the acceleration. Its velocity and acceleration are both zero. The horizontal component of its velocity is zero.Skeet Shooting is an Olympic sport for rifle marksmen. A skeet is a clay target. A lady marksman goes out to practice and sets her skeet launcher at a position 25 meters north and 40 meters west from where she intends to stand. When she yells “Pull!”, a skeet is launched due East at an angle of 37 degrees above the ground with an initial speed, vo. The marksman only fires due north. Two seconds after she yells “Pull!”, the bullet from her gun hits the clay skeet in the air. At what height did the clay skeet shatter? Neglect air friction effects. {Use sin(37o) = 3/5; cos(37o) = 4/5; and g = 10 m/s2 }
- # 1) A medieval archer is preparing for battle and practicing his long range shot from a particular bluff that is near a castle with moat around it. The magnitude of the initial velocity of the arrow is 67.0 m/s and the archer releases his arrow when the angle of his bow is 32.0° above the horizon. 0 0 34.6 m 2.6 m (A) What is the total time the arrow is in the air? Equations first, numbers last. Report answer to three sig figs. (B) What is the maximum horizontal distance the arrow can travel under the conditions of part (A)? Equations first, numbers last. Report answer to three sig figs.Skeet Shooting is an Olympic sport for rifle marksmen. A skeet is a clay target. A lady marksman goes out to practice and sets her skeet launcher at a position 25 meters north and 40 meters west from where she intends to stand. When she yells “Pull!”, a skeet is launched due East at an angle of 37 degrees above the ground with an initial speed, vo. The marksman only fires due north. Two seconds after she yells “Pull!”, the bullet from her gun hits the clay skeet in the air. At what height did the clay skeet shatter? Neglect air friction effects. {Use sin(37 degrees) = 3/5; cos(37 degrees) = 4/5; and g = 10 m/s2 }1. A player lines up to kick a 40 m goal. In the first attempt, the ball has an initial velocity of 20 m/s at angle of 55.0 degrees. The goal posts are 3 m high. Ônce the ball passes above the field goal post (i.e., after it has travelled 40 m in the horizontal direction), it is deemed successful. (a) Determine if the goal kicker's first attempt is successful. (b) If the kicker changes the angle of kicking to 30 degrees and the initial velocity so that it JUST reaches the goal post. Determine the new initial velocity of ball.
- 4. A football player punts the ball at a 45 angle. Without an effect from the wind, the ball would travel 60.0 m horizontally. (a) What is the initial speed of the ball? (b) When the ball is near its maximum height it experiences a brief gust of wind that reduces its horizontal velocity by 1.50 m/s. What distance does the ball travel horizontally?13. ssm A volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?A projectile launches at an initial velocity of 55 m/s. Determine the length of time it will take the projectile to land. g = 9.81 m/s^2 Vo 30° M N Ad, = (v,)t Ad, - = (v, )t V2y = Vi, - gt (v,) = (v, ) - 2g(Ad,) v = v, cos e (constant) Viy = v, sin e 1 = initial 2 = final
- Use the graph below to answer the next three questions. Two projectiles are launched on a planet without an atmosphere (g is NOT 9.8 m/s). Projectile A is in motion for 6 seconds, while projectile B is in motion for 3 seconds before hitting the ground. The +x direction is horizontal and the +y direction is up. 40 32 16 B. 2. 8. x (meters) 10 12 y (meters) 24A large cannon is fired from ground level over level ground at an angle of 30 degrees above the horizontal. The muzzle speed is 980 m/s. What horizontal distance will the projectile travel before striking the ground? Neglect air resistance. O 8.5 km O 170 km O 4.3 km O 85 km O 43 kmA projectile is fired horizontally - think about what this means about the initial y-velocity (viy) - at a velocity of 5.61 m/s. It is fired from a height of 1.04 meters. How far horizontally does the projectile go before it hits the ground?