EQUILIBRIUM
1.
Explain the following;
a) A mechanic chooses a spanner with a long handle to undo a tight
nut
[Show answer]
A spanner with long handle have high turning effect (Moment of force) due to large perpendicular distance from the turning point (nut) to the point of action of the force
b) The handle of a door is placed a long way from the hinge
[Show answer]
The handle of a door is placed a long way from the hinges in order to increase the turning effect (Moment of Force) by increasing the perpendicular distance from the turning point (hinges) to the point of action of the force (handle)
2.
The figure below shows a
machine for lifting water out of a lake.
Explain why the man using the machine pushes at the end of the lever
[Show answer]
Pushes at the end of the lever in order to increase the turning effect (Moment of Force) so as to lift a backet of water easily by increasing the perpendicular distance from the turning point (Point P) to the point of action of the force (man's hands)
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