Two forces produce equal torques on a door about the door hinge. The first force is at the midpoint of the door; the second forc

Question

3 years ago

7

Two forces produce equal torques on a door about the door hinge. The first force is at the midpoint of the door; the second forc

e is applied at the doorknob. Both fortes are applied perpendicular to the door. Which force has a greater magnitude?
the first force (at the midpoint).
the second force (at the doorknob).
the two forces are equal.

Physics

2 answers:

Andreas93 [3] · Answer 1 · 2022-06-03T20:57:22+03:00

Andreas93 [3]3 years ago

6 0

Answer:

The doorknob

Explanation:

Hitting the door further out will cause greater magnitude than hitting it closer to where the door swings.

faltersainse [42] · Answer 2 · 2022-06-03T22:27:34+03:00

Answer:

The force at the midpoint of the door.

Explanation:

The torque produced in the door will be:

T = rFsinθ

Here θ = 90 degrees so,

T = rF

At the midpoint of the door the moment arm is half than that of doorknob. So, to produce same torque we have to apply two times force at the midpoint of the door than the force at doorknob.