A juggler performs in a room whose ceiling is 6 m above the level of his hand. She throws a ball vertically upward so that it just reaches the ceiling. Use the above information to answer questions 8 to 11. 8. What is the initial velocity with which she throws the ball? (3) 9. What is the time required for the ball to reach the ceiling? (3) She throws a second ball upward with the same initial velocity, at the instant that the second ball is at the ceiling. 10. How long after the second ball is thrown do the two balls pass each other? (4) 11. When the balls pass each other, how far are they above the juggler's hands? (4)

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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.