Last one I PROMISE gravity question

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Homework Help Overview

The discussion revolves around a physics problem involving the acceleration of a rock falling from a cliff, considering the effects of air resistance. The subject area is dynamics, specifically the application of Newton's second law of motion.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the forces acting on the rock, including gravitational force and air resistance. There is an attempt to apply the equation F=ma, but some participants question the calculations and the forces involved, particularly the gravitational force.

Discussion Status

The discussion includes various interpretations of the forces at play. While one participant claims to have arrived at an answer, the process leading to that conclusion is not detailed, leaving the overall discussion open-ended.

Contextual Notes

Participants are navigating through the problem with limited information about the gravitational force acting on the rock, which is a crucial aspect of the discussion.

ladolce
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Homework Statement



A rock of mass 32 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 242 N. What is the magnitude of the acceleration of the rock?

Homework Equations



F=ma (?)

The Attempt at a Solution



I just did 242 N/32 kg and thought that was good but apparently that's not right?
 
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The SUM of all forces is: F = ma

so you find the force acting on the rock directed down wards, and upwards; the you will get the sum of the force acting on the rock.
 
There is a downward force of mg and an upward force of 242 N.
 
that's what i thought of later too, but how much force does gravity exert in N?
 
OK, I got the answer.
Thank you.
 

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