Biomechanics Static Forces on handle of locked door

[muddyjch]

Homework Statement

A person with a mass of 80kg pulls horizontally on the handle of a door which is locked. At that
instant, the ground reaction force has a magnitude of 810N. What is the force applied to the door?
(200 N)

Homework Equations

The Attempt at a Solution

It seems like there is something missing in this question and does the persons mass really matter? I am really confused on this one.

 

[berkeman]

Homework Statement

A person with a mass of 80kg pulls horizontally on the handle of a door which is locked. At that
instant, the ground reaction force has a magnitude of 810N. What is the force applied to the door?
(200 N)

Homework Equations

The Attempt at a Solution

It seems like there is something missing in this question and does the persons mass really matter? I am really confused on this one.

Welcome to the PF. Start by drawing a free body diagram (FBD) of the person, and list all of the forces that are acting on him/her. Be sure to include all horizontal and vertical forces. Then use the fact that the person is not moving, which implies that the sum of the forces is...?