# Lowering an object without breaking the the rope

## Homework Statement

How could a 1000 N object be lowered from a roof using a cord whose breaking strength is only 800 N?

∑F=ma

## The Attempt at a Solution

By slowing down the acceleration to a point where the force down would be less than 800.
weight=m(g)
1000N=m(9.8)
102.04kg=m
∑F=ma
799.99=102.04kg(a)
7.84m/s^2=a
Would this be the right answer?

Last edited:

TSny
Homework Helper
Gold Member
This is not the correct answer. Be sure to draw a free body diagram of the object. How many forces act on the object as it is being lowered?

Kingyou123
This is not the correct answer. Be sure to draw a free body diagram of the object. How many forces act on the object as it is being lowered?
The two forces are weight and force tension. Where did I go wrong exactly?

#### Attachments

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TSny
Homework Helper
Gold Member
Diagram looks good. When you set up ∑F = ma, the left side represents the vector sum of the two forces.

Last edited:
Kingyou123