3/252 Determine the value of the coefficient of restitu- tion e which results in the final velocity v' being perpendicular to the initial velocity v. 60°
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Answer: e= 0.333
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- 12-95. The basketball passed through the hoop even though it barely cleared the hands of the player B who attempted to block it. Neglecting the size of the ball, determine the magnitude va of its initial velocity and the height h of the ball when it passes over player B. 30° B h A 10 ft 7 ft - 25 ft +5 ft-Asap plzzz2-61. The bolt is subjected to the force F, which has components acting along the x, y, z axes as shown. If the magnitude of Fis 80 N, and a = 60° and y = 45°, determine the magnitudes of its components. Prob. 2-61
- A canoe has a velocity of 0.420 m/sm/s southeast relative to the earth. The canoe is on a river that is flowing at 0.500 m/sm/s east relative to the earth. Find the magnitude of the velocity v⃗ CRv→CR of the canoe relative to the river.A projectile is fired horizontally into a resisting medium with a velocity vo = 3.2 m/s and the resulting deceleration is equal to cv5, where c = 0.022 m-4s-³, and v is the velocity within the medium. Find the velocity v of the projectile at time t = 5.7 s after penetration. Answer: v= i jak w m/s11 5. A fire hose held near the ground shoots water at a speed of 6.8 m/s. At what angle, approximately, should the nozzle point in order for the water to land 4.0 m away? ل ما 4 =1.7 6.8mls 8 4.0m 2 Xf = yot Kixt + ½art ² A) 13° (B) 29° C) 77° D) 57.9⁰ E) none of the above 06.8) (17) + 12 (9.8) (1.2) ²
- 2-89. Determine the magnitude of the projected component of force FAC acting along the z axis. Fлс 3 EN FAn = 35 kN 45 m 3m 3 m 30QI/ 12–218. Two planes, A and B, are flying at the same altitude. If their velocities are vA = 500 km/h and Vg = 700 km/h such that the angle between their straight- line courses is 0 = 60°, determine the velocity of plane B with respect to plane A. A vA = 500 km/h vg = 700 km/h В Detailed explanation of the conceptBased on question 4, calculate hmax for v=10m/s. hm(10) hm(v=10); Based on question 4, find the critical speed for hmax =0 fzeros(hm,6) roots ([1/(2*g),g*D^2/2,-H]; fzero(hm,6); zeros(hm, 6);
- Professional golfers can drive the ball over 200 m. While air resistance is significant, its effects are nearly canceled because lift is gained from backspin on the ball, and so a reasonable description of the ball’s trajectory is obtained if air resistance is neglected. Suppose a golfer hits a ball 200 m on level ground, giving it an initial velocity at an angle of 45o. The duration of the impact of the club and ball has been measured to be 1.00 ms. c) Find the average force exerted by the club on the ball. d) Find the average shear deformation of the club's 0.800 m long and 1.00 cm diameter steel shaft.Professional golfers can drive the ball over 200 m. While air resistance is significant, its effects are nearly canceled because lift is gained from backspin on the ball, and so a reasonable description of the ball’s trajectory is obtained if air resistance is neglected. Suppose a golfer hits a ball 200 m on level ground, giving it an initial velocity at an angle of 45o. The duration of the impact of the club and ball has been measured to be 1.00 ms. a) Calculate the velocity of the ball just after it is struck b) What is the 0.0450 kg ball's change in momentum?A ball is thrown against a frictionless, vertical wall. Immediately before the ball strikes the wall, its velocity has a magnitude v and forms an angle of 30° with the horizontal. Knowing that e = 0.90, determine the magnitude and direction of the velocity v' of the ball as it rebounds from the wall. Vn 30°