1. The fastest measured pitched baseballleft the pitcher’s hand at a speed of 45.0 m/s. If the pitcher was incontact with the ball over a distance of 1.50m and produced constantacceleration, (a) what acceleration did he give the ball, and(b) how much time did it take him to pitch it? 2. A small rock is thrown vertically upward with a speed of22.0 m/s from the edge of the roof of a 30.0-m-tall building. Therock doesn’t hit the building on its way back down and lands onthe street below. Ignore air resistance. (a) What is the speed of therock just before it hits the street? (b) How much time elapses fromwhen the rock is thrown until it hits the street?
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
1. The fastest measured pitched baseballleft the pitcher’s hand at a speed of 45.0 m/s. If the pitcher was incontact with the ball over a distance of 1.50m and produced constantacceleration, (a) what acceleration did he give the ball, and(b) how much time did it take him to pitch it?
2. A small rock is thrown vertically upward with a speed of22.0 m/s from the edge of the roof of a 30.0-m-tall building. Therock doesn’t hit the building on its way back down and lands onthe street below. Ignore air resistance. (a) What is the speed of therock just before it hits the street? (b) How much time elapses fromwhen the rock is thrown until it hits the street?
Step by step
Solved in 2 steps with 2 images
