Concept explainers
Projectile Motion In Exercises 27-40, use the model for projectile motion, assuming there is no air resistance and
A bale ejector consists of two variable-speed belts at the end of a baler. Its purpose is to toss bales into a trailing wagon. In loading the back of a wagon, a bale must be thrown to a position 8 feet above and 16 feet behind the ejector.
(a) Find the minimum initial speed of the bale and the corresponding angle at which it must be ejected from the baler.
(b) The ejector has a fixed angle of
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Chapter 12 Solutions
Calculus: Early Transcendental Functions
- Force Tyler and his cousin Kelly have attached a rope to the branch of a tree and tied a board to the other end to form a swing. Tyler sits on the board while his cousin pushes him through an angle of 25.5 and holds him there. If Tyler weighs 95.5 pounds, find the magnitude of the force Kelly must push with horizontally to keep Tyler in static equilibrium. See Figure 1. Figure 1arrow_forwardForce Tyler and his cousin Kelly have attached a rope to the branch of a tree and tied a board to the other end to form a swing. Tyler sits on the board while his cousin pushes him through an angle of 25.5 and holds him there. If Tyler weighs 95.5 pounds, find the magnitude of the force Kelly must push with horizontally to keep Tyler in static equilibrium. See Figure 13.arrow_forwardWhen solving a uniform motion problem, how does creating a table help you?arrow_forward
- Architecture A mason is building a semielliptical arch that has a height of 4 feet and a width of 10 feet. Where should the foci be placed in order to sketch the arch?arrow_forwardB4-BCT35: Box ATTACHED TO SPRING-ENERGY BAR CHART A 40-N box is initially at rest on a smooth (frictionless) horizontal surface. An unstretched spring with spring constant 10 N/m connects the box to the wall. A 60 N force is applied horizontally to the right. Complete the energy bar chart for the spring-block-earth system as the block moves a distance of 2 m. Label the column heights. Set the zero point for the gravitational potential energy at the center of the block. 60 N W 40 N Initial system energy During Final system energy KE PE PE KE PE PE eat Bar chart key KE Kinetic energy Gravitational PE potential energy Spring ptpotential energy Work done by e external forcés Use g= 10 m/s for simplicity O PE W. Explain your reasoning.arrow_forwardThe device shown is a part of an automobile seat- back-release mechanism. The part is subjected to the 4-N force exerted at A and a 300-N-mm restor- ing moment exerted by a hidden torsional spring. Determine the y-intercept of the line of action of the single equivalent force. F=4 N 10 mm 15° 40 mm 300 N-mm SHOT ON MI MIX 3 AI DUAL CAMERAarrow_forward
- Find the velocity, acceleration, and speed of an object with position vector r(t) (VE, 4 + VF, 21). %3Darrow_forwardQ(4) The engine block M with a mass of 250kg is suspended from the pulley system in Figure Q4. What force F must be applied to the end of the rope to keep the engine suspended? F M Figure Q4 A 578 N B C D E 591 N 652 N 788 N 818 Narrow_forwardA basket of flowers of mass 3 kg is placed on a flat grassy slope that makes an angle θ with the horizontal. The coefficient of static friction between the basket and the slope is 0.45 and the basket is on the point of slipping down the slope. Model the basket of flowers as a particle and the grassy slope as a plane. Take the magnitude of the acceleration due to gravity, g, to be 9.8 m s−2 Express the forces in component form, in terms of θ and unknown magnitudes where appropriate. Write down the equilibrium condition for the basket and hence show that tan θ = 0.45. Determine the angle, in degrees, that the slope makes with the horizontal.arrow_forward
- The aircraft is flying at a velocity of 50 m/s, at an altitude of 4500 m. Determine the lift/span created by the rectangular wing, with chord of 3 m, and a span of 13 m. The airfoil is flying at an angle of attack of 4 deg, and has the following details. CL AOA -0.5 deg 4 deg (unknown) 8 deg 0.7 Your answerarrow_forwardCalculate the moment of inertia of the shaded area about the x-axis. 84 mm A 33 mm ---- -50 mm 50 mm Answer: Ix = i -x (106) mm²arrow_forwardConsider the motion of a soccer ball that is kicked from the point (xo.Yo) = (0,0) with an initial velocity of (uovo) = (30,4) m/s. Assume the x-axis is horizontal, the positive y-axis is vertical (opposite g), the ground is horizontal, and only the gravitational force acts on the object. a. Find the velocity and position vectors for t≥0. b. Graph the trajectory. c. Determine the time of flight and range of the soccer ball. d. Determine the maximum height of the soccer ball. a. The velocity vector is v(t) = The position vector is r(t) = b. Choose the correct graph below. A. X 30 B. Q MILINK X 0- 30 S. Ау ... 1- C. 0 c. The time of flight is (Type an integer or decimal rounded to three decimal places as needed.) The range is m. (Type an integer or decimal rounded to three decimal places as needed.) d. The maximum height is m. (Type an integer or decimal rounded to three decimal places as needed.) X D. 30 y X 30arrow_forward
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