A mountain climber stands at the top of a 20.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -2.80 m/s. (a) How long after the release of the first stone did the two stones hit the water? (Round your answer to at least two decimal places.) (s) (b) What initial velocity must the second stone have had, given that they hit the water simultaneously? (m/s) (c) What was the velocity of each stone at the instant it hit the water? first stone m/s second stone 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 mountain climber stands at the top of a 20.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -2.80 m/s.
(s)
(b) What initial velocity must the second stone have had, given that they hit the water simultaneously?
(m/s)
(c) What was the velocity of each stone at the instant it hit the water?
| first stone | m/s |
| second stone | m/s |
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