PHYSICS LAB REPORT 4 - FRICTION

PHYSICS LAB REPORT 4 - FRICTION - downward acceleration of...

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Lab Report 4: Friction Physics 1408-Section B TA: Steve Huang Elizabeth Hahm, partner: Mimi Kang Performed: September 20, 2010 Abstract: Two experiments were performed in order to measure the coefficient of static (u s ) and kinetic friction (u k ) between a wooden block and the aluminum track. The first part of the experiment consisted of applying an external force to the block of mass M 1 by hanging mass (M 2 ) connected to the block via a pulley. The tension transmitted by the string represents two objects acting on each other, therefore forming an action-reaction pair. And according to Newton’s third law, the tension is the same for both objects. Breaking the forces into the x- and y- components help come to the conclusion that the acceleration of the block along the plane will be equal to the
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Unformatted text preview: downward acceleration of the hanging mass. Eventually, the u s can be determined by finding mass M 2 for which the block begins to slide. The second part of the experiment consists of exploring the effect on the coefficient of friction if the surface on which the block is sliding is inclined. At a certain angle of inclination (θ k ), the force of kinetic friction F k and the force from the weight of the block F ׀׀ become equal and therefore the block slides down at a constant velocity. The average u s was 0.335, the average u k (larger surface area) was 0.17, and the average u k (smaller surface area) was 0.12....
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PHYSICS LAB REPORT 4 - FRICTION - downward acceleration of...

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