A block is pushed horizontally three times along a bench with varying forces. The following observations...
A block is pushed horizontally three times along a bench with varying forces. The following observations were made: 1) Force of 2.0N - Block does not move and high resistance in push 2) Force of 2.5N - Block does not move but less resistance 3) Force of 2.75N - Block moves with little to no resistance. What is the Friction force exerted by the bench on block to one decimal place?
Homework Answers
When Force of 2.0 N is applied block does not move and high resistance in push because the applied force is less than the maximum static friction force .
hence in this situation force of friction is equal to the applied force.
hence, Friction force exerted by the bench on block = applied force = 2.0 N
similarly, when Force of 2.5 N is applied block does not move and less resistance in push because the applied force is less than the maximum static friction force .
hence also in this situation force of friction is equal to the applied force.
hence, Friction force exerted by the bench on block = applied force = 2.5 N
When Force of 2.7 N is applied block moves with little to no resistance because now the applied force exceeds the maximum limiting friction.
now, the friction force = μsmg (very less in magnitude because now there is almost zero resistance)
hence, friction force = zero (approx)
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