It was observed that a tennis ball when served horizontally 7.5 ft above the ground strikes the smooth ground at B 20 ft away. Determine the initial velocity va of the ball and the velocity ve (and 6) of the ball just after it strikes the court at B. Take e= 0.7. 7.5 201 1) Using projectile motion analysis, determine va and the speed of the ball just before hitting the ground. 2) Apply the coefficient of restitution in the y-direction of motion, and the conservation of momentum in the x-direction of motion. 3) Find e using the two components of va.

It was observed that a tennis ball when served horizontally 7.5 ft above the ground strikes the smooth ground at B 20 ft away. Determine the initial velocity va of the ball and the velocity ve (and 6) of the ball just after it strikes the court at B. Take e= 0.7. 7.5 201 1) Using projectile motion analysis, determine va and the speed of the ball just before hitting the ground. 2) Apply the coefficient of restitution in the y-direction of motion, and the conservation of momentum in the x-direction of motion. 3) Find e using the two components of va.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Immediately after the bouncing golf ball leaves the floor, its components of velocity are Vx = 0.761 m/s, and Vy = 3.159 m/s. Determine the horizontal distance (meters) from the point where the ball left the floor to the point where it hits the floor again.
At the instant when u = 90°, the motor on the car wash sprayer in Figure P7.38 rotates counter-clockwise at 150 rpm and accelerates at 200 rad/s2. Use the relative acceleration method to graphically determine the angular velocity and angular acceler-ation of the nozzle arm.
If a particle has initial velocity of v0 = 12 ft/s to the right, at s0 = 0, determine its position when t = 10 s, if a = 2 ft/s2 to the left.
The angular velocity of rod OB varies as tetha = 8 - 12t^2 rad/s where t is in seconds. Compute the magnitude of the acceleration of point B at (a) t = 0; and (b) t= 1.0s.
The velocity of a particle traveling along a straight line is v = (8t ^ 2 - 9t) * f * t / m * i * n , where t is in mins. s = 6m when t = 0min , determine the position of the particle when (a) t = 0.6min and (b) t = 0.2min .
A 500 N block is resting on an inclined plane and is subjected to a constant force of 600N acting parallel to the inclined plane. After the block has moved 3 m from rest along the inclined plane the force 600N is removed. The inclined plane has a slope of three vertical to four horizontal. Coefficient of friction is 0.20 a. Which is the following gives the distance that the black will move further along the inclined plane until it will stop? b. Which of the following gives the velocity of the block when this for 600 Newton was removed? c. Which of the following gives the velocity of the block when it returns to its initial position?
If the e = 45°, and the bar 0Q is rotating in the counterclockwise direction at 1.6 rad/s, which of the following is the velocity of the slider P?.
9. A closed cylindrical tank is 2.0 m high and 1.0 m in diameter and contains oil (sg = 0.70) at a depth of 1.5 m. If the tank is subject to an angular velocity of 20 rad/sec, determine the area at the bottom of the tank that is uncovered with oil.
A ball is thrown vertically upward from the 12-m level in an elevator shaft with an initial velocity of 18 m/s.At the same instant, an open-platform elevator passes the 5-m level, moving upward with a constant velocity of 2 m/s.Determine when will the ball hit the elevator.Determine where will the ball hit the elevator measured from the groundWhat is the velocity of the ball when the ball hits the elevator
A body having a mass of 46 Kg rests on a horizontal plane for which the coefficient of friction f=0.4. A force P acts on the body at an angle of 20⁰ with the horizontal. Find its magnitude for impending motion.
The elevations of the ski jumping hill are as follows: hA = 44 mhB = 1.6 mhC = 4.9 m If the velocity of a ski jumper is measured to be 27.9 m/s at position B, what will be the launch velocity (in m/s) at position C.
The helicopter flying in Figure 4 with a constant velocity of 180 km/h and is directly above point A when a loose part begins to fall. The part lands 6.5 seconds later at point B on an inclined surface. 16. The vertical motion component of the falling part is A. uniform motion B. non-uniformly accelerated C. uniformly accelerated D. stationary