Code:
void my_onforceandtorque(NewtonBody* body)
{
	float mass, ixx, iyy, izz;
	NewtonBodyGetMassMatrix(body, &mass, &ixx, &iyy, &izz);
	NewtonBodySetForce(body, vectorf(0, 0, 0));
}

function player()
{
wait(2);
newton_addentity(me, (float)(9), NEWTON_BOX,my_onforceandtorque);

...


ore

Code:
function player()
{
wait(2);
newton_addentity(me, (float)(9), NEWTON_BOX,NULL);
...


didnt test it but should work

"empty"