ball is projected upward at time tt = 0.0 s, from a point on a roof 30 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 81.9 m/s. Consider all quantities as positive in the upward direction. At time tt = 8.36 s, the vertical component of the ball's velocity is closest to: A. -342 m/s B.+12 m/s
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.
A ball is projected upward at time tt = 0.0 s, from a point on a roof 30 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 81.9 m/s. Consider all quantities as positive in the upward direction. At time tt = 8.36 s, the vertical component of the ball's velocity is closest to:
A. -342 m/s
B.+12 m/s
C. zero
D. -12 m/s
E.+342 m/s
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