Concept explainers
For two kids of different masses balancing on a seesaw, should the heavier kid sit closer or farther from the fulcrum compared with the lighter kid?
The place where the heavier kid must sit from the fulcrum on the seesaw in order to balance it.
Answer to Problem 4A
Closer to the fulcrum as compared to the lighter kid.
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, in order to balance the seesaw, the torque exerted on the seesaw due to weight of the kids must be equal.
Since,
Conclusion:
Hence, the distance of the heavier kid from the fulcrum must be less than that of the lighter kid from the fulcrum.
Chapter 11 Solutions
Conceptual Physics: The High School Physics Program
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