Calculating the Mass of a 500N Barbell Lifted 2.2m from the Floor

[nlsed]

Homework Statement

A 500N barbell is lifted 2.2m from the floor

b)What is the mass of the barbell

Homework Equations

The Attempt at a Solution

b) I have no clue how to convert N to kg.. I don't think its possible..

 

[berkeman]

Homework Statement

A 500N barbell is lifted 2.2m from the floor

b)What is the mass of the barbell

Homework Equations

The Attempt at a Solution

b) I have no clue how to convert N to kg.. I don't think its possible..

Welcome to the PF. If your textbooks doesn't seem to be helping (?), Google is your friend. Google units Newton, and click on the first hit.

 

[nlightner]

I can provide you with the necessary information and equations to calculate the mass of the barbell.

First, we need to understand that Newtons (N) is a unit of force, while kilograms (kg) is a unit of mass. These two units are related by the equation F=ma, where F represents force, m represents mass, and a represents acceleration.

In this case, we know that the force (F) acting on the barbell is 500N and the distance (d) over which the force is applied is 2.2m. We can use the equation W=Fd to calculate the work done (W) in lifting the barbell.

W= (500N)(2.2m) = 1100 J

We also know that work is equal to the change in potential energy (U), which is given by the equation U=mgh, where m represents mass, g represents acceleration due to gravity (9.8 m/s^2), and h represents height.

Therefore, we can rearrange the equation to solve for mass:

m = (W/g)(1/h) = (1100 J)/(9.8 m/s^2)(1/2.2m) = 56.12 kg

Therefore, the mass of the barbell is approximately 56.12 kg.