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In Physics / High School | 2014-11-21

A stubborn 150 kg pig sits down and refuses to move. To drag the pig to the barn, the exasperated farmer ties a rope around the pig and pulls with his maximum force of 800 N. The coefficients of friction between the pig and the ground are [tex]\mu_s = 0.80[/tex] and [tex]\mu_k = 0.50[/tex].

Determine if the farmer can move the pig and calculate the force of friction acting on the pig.

Asked by Kamala777

Answer (2)

The question is about **static **and kinetic friction . Given the values for the coefficients of static and kinetic friction, the farmer's maximum force is not enough to overcome the pig's maximum static friction, so he will not be able to move the pig. If the farmer could manage to move the pig, the force required to keep the pig moving would be less, due to kinetic friction. ;

Answered by JamesCosmo | 2024-06-18

The farmer cannot move the pig because his pulling force of 800 N is less than the maximum static friction force of 1176 N. If the pig were to move, the force needed to keep it moving would be 735 N due to kinetic friction.
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Answered by JamesCosmo | 2024-09-03

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