Linear kinematics problem with limited variables.

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Homework Help Overview

The problem involves two rocks: one dropped from a height and another thrown upwards from the ground. The objective is to determine the time at which they meet, given limited information about their initial conditions and acceleration due to gravity.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the necessity of writing equations to describe the motion of both rocks. There is uncertainty about the sufficiency of the provided information, particularly the initial velocity of the rock thrown upwards. Some suggest that substitution may be needed to equate the times of both rocks.

Discussion Status

The discussion is ongoing, with participants questioning the completeness of the problem statement and exploring the implications of missing information. Some guidance has been offered regarding the need for equations of motion, but no consensus has been reached on how to proceed.

Contextual Notes

There is a noted absence of the initial velocity for the rock thrown upwards, which is critical for solving the problem. Participants are also considering the implications of this missing information on the overall solution.

Btipold
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A rock is dropped from a cliff of height h. At the same time a rock is thrown straight up from the bottom with an initial velocity. Assuming they meet, at what time will they meet.

V1 = 0
A = -9.82

Thats all you have across both rocks... is this even possible. You probably have to do some substitution equation and make ts equal each other. Idk.
 
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Btipold said:
A rock is dropped from a cliff of height h. At the same time a rock is thrown straight up from the bottom with an initial velocity. Assuming they meet, at what time will they meet.

V1 = 0
A = -9.82

Thats all you have across both rocks... is this even possible. You probably have to do some substitution equation and make ts equal each other. Idk.
Well, if you don't write down any equations which describe the motion of each rock, the solution to this problem will remain an eternal mystery.
 
Btipold said:
A rock is dropped from a cliff of height h. At the same time a rock is thrown straight up from the bottom with an initial velocity. Assuming they meet, at what time will they meet.

V1 = 0
A = -9.82

Thats all you have across both rocks... is this even possible. You probably have to do some substitution equation and make ts equal each other. Idk.
Clearly the answer will depend on the velocity with which the lower rock is thrown. The question statement reads as though you were about to be given that velocity, but it's missing. Have you left something out?
 
They will meat if ## x_1 = x_2 ## where ## x_1, x_2 ## are the equation of motion of rock 1 and rock 2, can you figure out what these equation are ?
 

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