Equilibrium and Elasticity problems

[ahmadonline]

Hello,

Please I have 3 questions and I don't know how to solve them. So, please help me with the way to solve these questions.

Q1 :

A uniform 267-g meter stick can be balanced by a 217-g weight placed at the 100-cm mark if the fulcrum is placed at the point marked:

Give your answer in centimeters.


Q2 :

An 882-N man stands halfway up a 6.5-m long ladder of negligible weight. The base of the ladder is a = 4.6m from the wall as shown. Assuming that the wall-ladder contact is frictionless, find the magnitude of the force with which the wall pushes against the ladder?

Answer in SI units.


Q3 :

A certain wire stretches 0.82cm when outward forces with magnitude F are applied to each end. The same forces are applied to a wire of the same material but with 4.9 times the diameter and 3.8 times the length of the first wire. How much does the second wire stretch?

Answer in CENTIMETERS and upto 2 decimal places.

 

[ashishsinghal]

Answer in CENTIMETERS and upto 2 decimal places.

Here, at PF we are not supposed to answer the questions. We help students solve the question by resolving any doubt or giving hints.

These questions involve concept of torque. Are you familiar with it? Here you need to balance all kind of force and torque to attain equilibrium.