QI A ball is thrown up vertically with the initial velocity of 20ms- from ground level. The motion of the ball is given by s =-5t2 + 20t. Find the (a) velocity at t = 1, (b) velocity at t = 3, (c) time needed for the ball to reach the maximum point, (d) maximum attained by the ball, (e) total time before the ball reaches the ground again, () velocity of the ball when it hits the ground.
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.
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