# Applying concentrated force

**URL:** <https://community.freefem.org/t/applying-concentrated-force/1377>\
**Category:** General Discussion\
**Created:** [December 9, 2021, 6:41pm UTC](https://community.freefem.org/t/applying-concentrated-force/1377 "2021-12-09T18:41:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![distractor](https://avatars.discourse-cdn.com/v4/letter/d/57b2e6/32.png) [@distractor](https://community.freefem.org/u/distractor)\
**Post date:** [December 9, 2021, 6:41pm UTC](https://community.freefem.org/t/applying-concentrated-force/1377/1 "2021-12-09T18:41:31Z")

</div>

How do I apply concentrated force in FF++?

So assume I have force

```auto
Vh(Th, P1);
Vh fx, fy, fz;

```

where `force = (fx, fy, fz)`. Now In problem definition, I want to apply these forces to the nodes, for example in linear elasticity

```auto
solve lame([u, v], [uu, vv])
  = int2d(Th)(
       lambda * div(u, v) * div(uu, vv)
     + 2.*mu * ( epsilon(u,v)' * epsilon(uu,vv) )
  )
  - // Forces applied to nodes.
+ on(4, u=0, v=0)
 ;

```

Is there a way I can do that?