- #1

KneelsBoar

- 4

- 0

## Homework Statement

[/B]

A man weighing 980 N slides down a rope that can support a weight of only 755 N.

**a) How is this possible?**

**b) What is the least acceleration he can have without breaking the rope?****c) What will his minimum speed be after sliding down 8.0 m?**## Homework Equations

Not specified, but I think it's ΣF = ma, and W = mg.

## The Attempt at a Solution

For a) I detail here that because of the speed at which the person is moving, he weighs less than he would if he were stationary, is this correct?

For b) For this, I used "W = mg". I figured that the gravity is known and so is his weight, so I transposed this and found his mass to be 100 kg. (980/9.8). So now that I had the mass of the person, I put into the equation "W = mg", that the weight must = 755 and the mass = 100 kg and I got that -7.55 m/s2 was the speed, is this correct?

For c) I wasn't sure how to solve this question, could someone help me out?

Thank you.