Force pushes and pulls two blocks at an angle

In summary, you can solve for the acceleration of the blocks by using the following equation: Fcostheta=ukN+fk.
  • #1
gap0063
65
0

Homework Statement


A force of 23.52 N pushes and pulls to blocks
as shown in the figure below. The vertical
contact surfaces between the two blocks are
frictionless. The contact between the blocks
and the horizontal surface has a coefficient of
friction of 0.29.
The acceleration of gravity is 9.8 m/s2
What is the magnitude a of the acceleration
of the blocks?
Answer in units of m/s2



Homework Equations


I know its the sum of Fy=N-mg=0 => N=mg
and the sum of Fx= -fk=max



The Attempt at a Solution


fk=ukN=> fk=20.4624
but I do not know how to plug in Fcostheta or Fsintheta and I know those need to be used somewhere

[PLAIN]http://img685.imageshack.us/img685/9849/006sl.png [Broken]
 
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  • #2
Create a free body diagram for each block, and then use ∑F=manet to find the resulting acceleration.

What forces are acting on each block?
How can you use these forces to find the net force on the blocks in the x direction?
 
  • #3
jhae2.718 said:
Create a free body diagram for each block, and then use ∑F=manet to find the resulting acceleration.

What forces are acting on each block?
How can you use these forces to find the net force on the blocks in the x direction?

On the first block in the y direction there is N and m1g
in the x direction there is fk and F...
On the second block in the y direction there is Fsintheta, N, and m2g
in the x direction there is fk and Fcostheta...

right?
 
  • #4
gap0063 said:
I know its the sum of Fy=N-mg=0 => N=mg
The sum of the vertical components on each block must add to zero, but N and mg are not necessarily the only forces with vertical components.
and the sum of Fx= -fk=max
The sum of horizontal forces must equal max. What are the horizontal forces acting on this system?
 
  • #5
Doc Al said:
The sum of the vertical components on each block must add to zero, but N and mg are not necessarily the only forces with vertical components.

The sum of horizontal forces must equal max. What are the horizontal forces acting on this system?

Thanks! figured out the other components!

Thank you for you're help on my other problems too you're a live saver
 

What is a force?

A force is a push or pull that can cause an object to move, change direction, or change shape.

What is a force push?

A force push refers to a force that is applied to an object in a direction away from the source of the force.

What is a force pull?

A force pull refers to a force that is applied to an object in a direction towards the source of the force.

What are blocks?

Blocks are objects with a defined shape and size that can be moved or interacted with by forces.

How does the angle of force affect the movement of two blocks?

The angle of force determines the direction in which the blocks will move. If the force is applied at a 90 degree angle, the blocks will move straight away from each other. If the force is applied at a smaller angle, the blocks will move in a diagonal direction.

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