Moment of Force Puzzles
Puzzle 1: A seesaw is balanced, but a child moves closer to the pivot. What will happen?
Moment of force depends on distance from the pivot.
The moment of force decreases, and the other side may tilt.
Puzzle 2: A door is easier to open when pushed near the handle. Why?
Torque = Force × Distance from pivot.
A greater distance from the hinge increases the turning effect.
Puzzle 3: A spanner is used to turn a nut. How can you increase the turning effect?
Think about increasing force or distance.
Use a longer spanner or apply more force.
Puzzle 4: A ladder leans against a wall. What force prevents it from slipping?
Consider friction at the base.
Friction between the ladder and the ground prevents slipping.
Puzzle 5: A mechanic uses a wrench to loosen a bolt. What happens if he pushes at an angle instead of perpendicularly?
Torque depends on perpendicular force.
The effective force decreases, reducing the moment of force.