A school yard teeter totter with a total length of 4.0 m and amass of 36 kg is p

Question

A school yard teeter totter with a total length of 4.0 m and amass of 36 kg is pivoted at its center. A 16 kg child sits on oneend of the teeter totter.       (a) Where should a parentpush with a force of 202 N in order to hold the teeter totterlevel?                              Meters(from the pivot)?          (b)Where should the parent push with a force of 388 N to keep theteeter totter level?                                  Meters(fromthe pivot)? A school yard teeter totter with a total length of 4.0 m and amass of 36 kg is pivoted at its center. A 16 kg child sits on oneend of the teeter totter.       (a) Where should a parentpush with a force of 202 N in order to hold the teeter totterlevel?                              Meters(from the pivot)?          (b)Where should the parent push with a force of 388 N to keep theteeter totter level?                                  Meters(fromthe pivot)?

Explanation / Answer

A school yard teeter totter with a total length of 4.0 m and amass of 36 kg is pivoted at its center. A 16 kg child sits on oneend of the teeter totter.       (a) Where should a parentpush with a force of 202 N in order to hold the teeter totterlevel?                              Meters(from the pivot)?
from the equilibrium of moments
(16+18)*9.8*2=(202+18*9.8)*x
calculating x= 2.3766m
         (b)Where should the parent push with a force of 388 N to keep theteeter totter level?
applying the same formula
(16+18)*9.8*2=(388+18*9.8)*x
calculating x=1.1807m                              Meters(from the pivot)?

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