A bar with length 2 l , elastic modulus E , and cross section A is fixed to the wall at point P At point Q , a force F 1 is acting in the positive x direction At point R , a force F 2 s acting in the negative x direction a Determine the stress in a cross section between points P and Q b Determine the stress in a cross section between points Q and R c Determine the strains at point Q and R d Determine the displacements at point Q and R e What would the relationship between F 1 and F 2 have to be so that the displacement at point R equals zero

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Question: A bar with length 2 l , elastic modulus E , and cross - section A is fixed to the wall at point P .

A bar with length

2 l,

elastic modulus

E,

and cross

-

section

A

is fixed to the wall at point

P .

At point

Q,

a force

F_{1}

is acting in the positive

x -

direction. At point

R,

a force

F_{2} s

acting in the negative

x -

direction.

.

Determine the stress in a cross

-

section between points

P

and

Q .

.

Determine the stress in a cross

-

section between points

Q

and

R .

.

Determine the strains at point

Q

and

R

.

Determine the displacements at point

Q

and

R

.

What would the relationship between

F_{1}

and

F_{2}

have to be so that the displacement at

point

R

equals zero?

A bar with length 2 l , elastic modulus E , and

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