Concept explainers
Is the net torque changed when a partner on a seesaw stands or hangs from her end instead of sitting? (Does the lever arm change?)
Whether the net torque changed when a partner on a seesaw stands or hangs from her end instead of sitting.
Answer to Problem 29A
No
Explanation of Solution
Introduction:
The torque acting about an axis of rotation due to the force
Where,
When the kids sat on the seesaw, their weight acts in downward direction. Hence, the angle between the distance and the force on the kids is
Now, when a partner on a seesaw stands or hangs from her end instead of sitting, even then the distance of point of application of force from the fulcrum will not change.
Conclusion:
Hence, the net torque does not change when a partner on a seesaw stands or hangs from her end instead of sitting.
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