Biomechanics Static Forces on handle of locked door

AI Thread Summary
A person with a mass of 80kg pulls horizontally on a locked door handle, with a ground reaction force of 810N. The question asks for the force applied to the door, which is stated to be 200N. Participants express confusion about the relevance of the person's mass in this scenario. To solve the problem, it is suggested to draw a free body diagram (FBD) to visualize the forces acting on the person. The discussion emphasizes the importance of understanding static equilibrium, where the sum of forces must equal zero.
muddyjch
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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.
 
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muddyjch said:

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...?
 

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