rozsądna siła

The present law requires that physical discipline of a child use no more than "reasonable force".

A bit like being able to use 'reasonable force' against a burglar.

He said the law allows officers "to use such reasonable force as necessary to take the person into custody."

The agents, they say, used reasonable force to stop him.

A police officer may then use reasonable force to gain entry to premises and access to the child.

Until then, bear in mind the spirit of the law: use reasonable force to defend yourself, but only when you must.

But if the worst happens, you have every right to defend yourself with reasonable force.

It is difficult to exactly define the meaning of 'reasonable force'.

Rather like the use of "reasonable force" in other cases.

A police statement said when they refused to leave, reasonable force was used to remove them, and eight people were arrested.