Physics 5054 · O Level · Pressure

Pressure — practice question

The diagram represents an athlete performing press-ups on a floor. Both hands are in contact with the floor. The contact area of each hand with the floor is S. During each press-up, the athlete’s toes serve as the pivot. The athlete’s weight $W$ acts through point X. The distance from his toes to point X is three quarters of the distance from his toes to his shoulders. What pressure is produced on the palm of each of the athlete’s hands?

  • A$\frac{W}{8S}$
  • B$\frac{3W}{8S}$
  • C$\frac{W}{4S}$
  • D$\frac{3W}{4S}$

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