Wednesday
November 26, 2014

Homework Help: Physics

Posted by Andrea on Wednesday, November 7, 2007 at 5:06pm.

A lever is 5m long. The distance from fulcrum to the weight to be lifted is 1m. If the worker pushes on the opposite end with 400N, what is the max weight that can be lifted?

l=5m
h=1m
F=400N
F_g=?

torque=F_g*l
I first must find torque so that I can plug it into the above equation.
F=torque/r
400N=torque/5m
=2000Nm

thus
200Nm =F_g(5m)
F_g=400N

is this correct? Or would r=1m? Does the 1m in the question matter for this problem? Or is it just extra information?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - a lever is 5 m long. The distance from the fulcrum to the weight to be...
theory of machine - a differential band brake has a drum of diameter 800mm. the ...
PHYSICS - A box is lifted with a pry bar, by slipping the bar under the box and...
PHYSICS - A box is lifted with a pry bar, by slipping the bar under the box and ...
physics - A man lifts various loads with the same lever. The distance of the ...
physics - 3. A man lifts various loads with the same lever. The distance of the ...
PHYSICS please HELP - A box is lifted with a pry bar, by slipping the bar under ...
physics - A man lifts various loads with the same lever. The distance of the ...
science - A man lifts various loads with the same lever. The distance of the ...
Physics - A weight of 31 N is located a distance of 10.8 cm from the fulcrum of ...

Search
Members