Is any work being done by each of the following agents? And if so,is the work po

Question

Is any work being done by each of the following agents? And if so,is the work positive or negative? A. A chicken scratching the ground? B. A person studying C. A crane lifting a bucket of concrete D. The force of gravity on the bucket in part C. E. The leg muscles of a person in the act of sittingdown. A. A chicken scratching the ground? B. A person studying C. A crane lifting a bucket of concrete D. The force of gravity on the bucket in part C. E. The leg muscles of a person in the act of sittingdown.

Explanation / Answer

work is done when a force is applied and the object moves. Itis positive if the object moves in the direction of the force,negative if the object moves in the direction opposite the force.So... . Is any work being done by each of the following agents? And ifso, is the work positive or negative? A. A chicken scratching the ground?    POSITIVE WORK (assuming the chicken moves a bit of dirt) B. A person studying       NO WORK C. A crane lifting a bucket ofconcrete      POSITIVE WORK D. The force of gravity on the bucket in partC.      NEGATIVE WORK E. The leg muscles of a person in the act of sittingdown.   NEGATIVE WORK A. A chicken scratching the ground?    POSITIVE WORK (assuming the chicken moves a bit of dirt) B. A person studying       NO WORK C. A crane lifting a bucket ofconcrete      POSITIVE WORK D. The force of gravity on the bucket in partC.      NEGATIVE WORK E. The leg muscles of a person in the act of sittingdown.   NEGATIVE WORK

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