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

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Concept explainers

State Plane Coordinate Systems

The state plane coordinate system (SPCS or SPS) is a collection of 124 coordinate systems or geographic zones prepared for particular regions of the U.S. Every state consists of one or more than one state plane zone, the boundaries of which generally follow the county lines. Inside the U.S., there are 110 zones in total, 10 more zones in Alaska, 5 in Hawaii, and 1 for Puerto Rico and US Virgin islands. The system is extensively used for geospatial and geographic data assembling by the state and local governments.

Question

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.

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