Question

The iron door of a building is 3 m broad. It can be
opened by applying a force of 100 N normally at
the middle of the door. Calculate : (a) the torque
needed to open the door, (b) the least force and its
point of application to open the door.
of point of anplication of door.




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Answer 1

Explanation:

Given

S=3m

F=100N

(a) torque=F×r

=100×3

=300Nm^-2

b) 300