When a projectile reaches the highest point the horizontal component of the acceleration is: A) A. Less thang B B. Positive g c) C. Negative g D) D. Zero E) E) No answer
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- A skier leaves the end of a horizontal ski jump at 22.0 m/s and falls through a vertical distance of 3.20 m before landing. Neglecting air resistance, (a) how long does it take the skier to reach the ground? (b) How far horizontally docs the skier travel in the air before landing? (Sec Section 3.4.)1110. In Fig. P-1109, a ball thrown down the incline strikes it at a distance s 254.5 It. If the ball rises to a maximum height h 64.4 ft above the point of release, compute its initial velocity vo and inclination 6. Ans. v. = 80.5 ft per see; 0= 53.1° FIG. P-1109 and P-1110.1106. A projectile is fired with an initial velocity of v. ft per sec upward at an angle of 0° with the horizontal. Find the horizontal distance covered before the projectile returns to its original level. Also determine the maximum height attained by the projectile. v.? sin 2 0 ;h v. sin? 6 2 g Ans. I = %3D 1107 The oon ah
- Kinematics 2: Motion in 2-Dimensions and ons 19. An object is moving in a uniform circular motion. True or False? The linear velocity of the object is constant. 25. An 20. An object is moving in a uniform circular motion. True or False? The centripetal accelerationn is equal to-g. ur re 21 An object is moving in a uniform circular motion. True or False? The direction of the centripetal acceleration is always towards the center 26 22. An object is moving in a uniform circular motion. True or False? rad/s is a unit of angular frequency.During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.42 km/s at an initial inclination of 65.7◦ to the horizontal. The acceleration of gravity is 9.8 m/s2. a) How far away did the shell hit in km. b) How long was it in the air in s?3. A cold duck slides down a snow-covered hill inclined at an angle of 25° to the horizontal. If the duck's speed down the incline is a con- stant 5.0 m/s, determine the horizontal and vertical components of its velocity.
- Q5. Rewrite these vectors to fix the notation errors: d = 4.2 [W] km т v = 11.2–(E) S m à = [down] 4.7 I1.) A vehicle runs horizontally at the rate of 20m/sec for 10 sec., then turns in a direction of 30 deg. With horizontal and decelerate at 10 m/sec for 5 sec. a.)What is the total distance traveled within the 15 sec period? b.)And what is its total displacement?1. A projectile is thrown with a speed of 100 ft/s in a direction 30 degrees above the horizontal. Illustrate the projectile motion and answer the following: a. How many feet will it rise? b. How many feet will the maximum horizontal displacement be?
- 9. An object is launched at a velocity of 20 m/s in a direction making ar angle of 25° upward with the horizontal. c) What is the maximum height reached by the object? d) What is the total flight time (between launch and touching the ground) of the object? e) What is the horizontal range (maximum x above ground) of the object?Duning NASA microgravity drop test at Kennedy Space Center, Inter Bayamon Cubesat, PR CuNar 2 reached a speed of 3 mis along a crcular trajectory that has a radius of 20 m. For a short distance from s =0, its speed is then increase by atangential = (03s) m/s, where s is in meter. a) Determine its speed when its has moved s 10 m. b) Determine the magnitude of its acceleration when it has moved s 10 m. t al1. A table tennis ball rolls off the edge of a tabletop with an initial speed of 24.0 m/s. (a) Find the tabletennis ball’s initial horizontal and vertical velocities. (b) After 3.0 s, how far had it traveled vertically andhorizontally?